Related
Hello everyone. I'm having a problem with my network after going into the test menu (*#*#4636#*#*):crying:. I'm hoping someone can help me out.
My Phone:
I have a stock Nexus 6p not rooted.
The Problem Cause:
After going into the test menu (*#*#4636#*#*). I pressed the menu button (...) and pressed the "Set GSM/UMTS Band" button. My three options were "USA Band", "Band 6" and "Band 7", decided to select "USA Band".
The Problem effect:
Since I did that, I can't make or receive phone calls. My phone won't ring (though it "rings" for the person trying to call me and they get to my voicemail). If I try to call someone else, it hangs perpetually at "dialing".
Soulution I have try:
1-Setting the bands and switch between USA,6,7 but nothing changed.
2-Doing soft/hard factory reset but also nothing changed.
Any ideas how to fix this problem?!
S_2z said:
Hello everyone. I'm having a problem with my network after going into the test menu (*#*#4636#*#*):crying:. I'm hoping someone can help me out.
My Phone:
I have a stock Nexus 6p not rooted.
The Problem Cause:
After going into the test menu (*#*#4636#*#*). I pressed the menu button (...) and pressed the "Set GSM/UMTS Band" button. My three options were "USA Band", "Band 6" and "Band 7", decided to select "USA Band".
The Problem effect:
Since I did that, I can't make or receive phone calls. My phone won't ring (though it "rings" for the person trying to call me and they get to my voicemail). If I try to call someone else, it hangs perpetually at "dialing".
Soulution I have try:
1-Setting the bands and switch between USA,6,7 but nothing changed.
2-Doing soft/hard factory reset but also nothing changed.
Any ideas how to fix this problem?!
Click to expand...
Click to collapse
Factory image.
https://developers.google.com/android/nexus/images?hl=en#angler
Same problem
I'm having the exact same problem. I couldn't make or receive calls out of the box. When I fiddled with the test menu, I was able to at least get it to where I could place calls but I still cannot receive them. I'm not sure what I did at this point. Verizon support and Huawei support have been useless. I tried to factory reset and that did not help.
RageSalamando said:
I'm having the exact same problem. I couldn't make or receive calls out of the box. When I fiddled with the test menu, I was able to at least get it to where I could place calls but I still cannot receive them. I'm not sure what I did at this point. Verizon support and Huawei support have been useless. I tried to factory reset and that did not help.
Click to expand...
Click to collapse
Flash the whole image as the colleague up there said...radio flash should fix it
S_2z said:
Hello everyone. I'm having a problem with my network after going into the test menu (*#*#4636#*#*):crying:. I'm hoping someone can help me out.
My Phone:
I have a stock Nexus 6p not rooted.
The Problem Cause:
After going into the test menu (*#*#4636#*#*). I pressed the menu button (...) and pressed the "Set GSM/UMTS Band" button. My three options were "USA Band", "Band 6" and "Band 7", decided to select "USA Band".
The Problem effect:
Since I did that, I can't make or receive phone calls. My phone won't ring (though it "rings" for the person trying to call me and they get to my voicemail). If I try to call someone else, it hangs perpetually at "dialing".
Soulution I have try:
1-Setting the bands and switch between USA,6,7 but nothing changed.
2-Doing soft/hard factory reset but also nothing changed.
Any ideas how to fix this problem?!
Click to expand...
Click to collapse
What carrier are you with? I did the same thing but I managed to get my phone working again.
why did you mess with these settings if you don't know EXACTLY what you're doing? very big mistake. there some settings you should never fiddle with unless you're dead certain
best best now, imo, if the factory image doesnt fix it... unlock your bootloader and install a ROM that has an expanded set of radio bands... I know some ROMs have it, but not sure which ones.
Yes use Chroma it has more bands to choose from. I think someone needs to create a sticky not to mess with those settings.
I only messed with the settings because I was already not able to make or receive phone calls. Messing with the settings allowed me to at least call out now.
RageSalamando said:
I only messed with the settings because I was already not able to make or receive phone calls. Messing with the settings allowed me to at least call out now.
Click to expand...
Click to collapse
Flash the factory image. That way you know for sure you are as stock as could be. Then if the problem persists exchange the device because its faulty. You shouldn't have to mess with any settings to make calls. Other than maybe a borked APN setting.
RageSalamando said:
I only messed with the settings because I was already not able to make or receive phone calls. Messing with the settings allowed me to at least call out now.
Click to expand...
Click to collapse
What carrier are you on. I have delt with this issue with another member on here. We resolved it.
Verizon
scoobysnack said:
What carrier are you on. I have delt with this issue with another member on here. We resolved it.
Click to expand...
Click to collapse
I'm on Verizon.
Set GSM/UMTS Band Problem Resolved
scoobysnack said:
Yes use Chroma it has more bands to choose from. I think someone needs to create a sticky not to mess with those settings.
Click to expand...
Click to collapse
:good::good::good::good:
Yep! Flashing the Chroma ROM did it! It's all back to normal now. Thank you scoobysnack soooooooooo much for your help!
what I did are;
1. Hard reset
2. Unlock bootloader
3. Install TWRP
4. Root
5. Install custom firmwares
6. Revert back to stock firmware
7. Install different 'radio' images
8. Install different stock firmwares
Unfortunately, none gave me a positive outcome.
Last Hope Was:
I flashed Chroma, a lightweight AOSP ROM focused on battery, performance and stability.
http://forum.xda-developers.com/nex...-chroma-11-08-2015-lockscreen-navbar-t3244444...
The following link is for Chroma download and installation instruction:
http://nexus6proot.com/nexus-6p-custom-roms/chroma-rom-for-nexus-6p-android-6-0-1/2/
This custom ROM for Huawei Nexus 6P was first recommended by a scoobysnack. It works with a proper selection of bands according to your country.
On the dialer, use this codes *#*#4636#*#*
Selection for different bands would then available.
S_2z said:
:good::good::good::good:
Yep! Flashing the Chroma ROM did it! It's all back to normal now. Thank you scoobysnack soooooooooo much for your help!
what I did are;
1. Hard reset
2. Unlock bootloader
3. Install TWRP
4. Root
5. Install custom firmwares
6. Revert back to stock firmware
7. Install different 'radio' images
8. Install different stock firmwares
Unfortunately, none gave me a positive outcome.
Last Hope Was:
I flashed Chroma, a lightweight AOSP ROM focused on battery, performance and stability.
http://forum.xda-developers.com/nex...-chroma-11-08-2015-lockscreen-navbar-t3244444...
The following link is for Chroma download and installation instruction:
http://nexus6proot.com/nexus-6p-custom-roms/chroma-rom-for-nexus-6p-android-6-0-1/2/
This custom ROM for Huawei Nexus 6P was first recommended by a scoobysnack. It works with a proper selection of bands according to your country.
On the dialer, use this codes *#*#4636#*#*
Selection for different bands would then available.
Click to expand...
Click to collapse
I'm glad you figured it out. However, If you tried the factory image and it didn't work, that's a problem! You should have had cellular service right out of the box and definitely after you flashed the factory image. Unless you did not actually try the factory image itself. Can you clarify. Because if that's the case you have a defective unit and it will be an issue when you need to actually restore your device some day. Also don't want people to get the idea that a factory image is not a fix for this.
XxMORPHEOUSxX said:
I'm glad you figured it out. However, If you tried the factory image and it didn't work, that's a problem! You should have had cellular service right out of the box and definitely after you flashed the factory image. Unless you did not actually try the factory image itself. Can you clarify. Because if that's the case you have a defective unit and it will be an issue when you need to actually restore your device some day. Also don't want people to get the idea that a factory image is not a fix for this.
Click to expand...
Click to collapse
Flashing the factory image does not work. I messed with my phone for 4 hours trying to get of to work again. I was originally on chroma when I screwed my bands up. That's how I knew about the other bands. I believe it only fixes international phones . I'm in the US on VZW and flashed factory image and had to select band 6. So depending on where you are depends on what method you have to use to correct the problem. And yes a sticky and FAQ should be made as a lot of people seen to have this problem.
scoobysnack said:
Flashing the factory image does not work. I messed with my phone for 4 hours trying to get of to work again. I was originally on chroma when I screwed my bands up. That's how I knew about the other bands. I believe it only fixes international phones . I'm in the US on VZW and flashed factory image and had to select band 6. So depending on where you are depends on what method you have to use to correct the problem. And yes a sticky and FAQ should be made as a lot of people seen to have this problem.
Click to expand...
Click to collapse
The images work on either variant. It confuses me why a factory image would not fix it but I'm sure there is a reason. Its new to me though. What's weird is I am on Verizon in the US as well. Works right out of the box for me and any issues that I have come across have been fixed by a factory image. I wonder if people having problems on Verizon are having issues due to network and sim card provisioning issues and by switching bands you are fixing it but you are not on the normal bands maybe. I know some people on Verizon had to call and tell them to activate LTE on their line even though they were supposed to be getting it. And that fixed the no service.
Nexus 6p - Set GSM/UMTS Band Problem
XxMORPHEOUSxX said:
The images work on either variant. It confuses me why a factory image would not fix it but I'm sure there is a reason. Its new to me though. What's weird is I am on Verizon in the US as well. Works right out of the box for me and any issues that I have come across have been fixed by a factory image. I wonder if people having problems on Verizon are having issues due to network and sim card provisioning issues and by switching bands you are fixing it but you are not on the normal bands maybe. I know some people on Verizon had to call and tell them to activate LTE on their line even though they were supposed to be getting it. And that fixed the no service.
Click to expand...
Click to collapse
I guess the reason why a factory image did not fix the problem is because my phone version is US not International. And I am now not from US, originally from Middle East. So there is no compatibility between US and the international bands. The only choices I had from the Bands are USA Band, 6 and 7. I am guessing that the International version has more options and compatible with variant bands.
guys. try to install chroma rom , it has several different bands. just to get it working . then return back to stock if you want i had the same issue and i had data working and sms without calls until a guy helped me ( im very grateful for him ). i hope it works. please let me know
@scoobysnack .. man, I came to help but you were faster haha
I used Chroma ROM it gives you proper selection of bands according to your country.
Similar problem
I have the same issue and my carrier is Airtel - from India. Will Chroma work with this?
RageSalamando said:
I'm on Verizon.
Click to expand...
Click to collapse
USE AT YOUR OWN RISK
This guide is intended for those individuals who can not use 3g or LTE but 2g works perfectly for them or they have lost their network and flashing different radios does not help
To check if you have this problem, go to settings>more>Mobile Network>Manual Search
You should have GSM / WDCMA/LTE or others depending on your network from all networks in your area.
What do you need :
*Drivers installed
*USB debugging (enable by going into settings>software information> tap on build number 10 times and developer options will appear in settings at the end. Enable USB debugging from there)
*ROOT
*QPST (QPST DOWNLOAD) LINK2
*EFS BACKUP TOOL (EFS BACKUP THREAD)
* Device specific backup of QCN (FIND IT YOURSELF AS IT WILL CHANGE YOUR IMEI TOO)
*DIAG MODE ENABLED
This is how to enable diag mode via platform tools using ADB on LG devices
Code:
adb shell
su
echo 1 > /sys/devices/platform/lg_diag_cmd/diag_enable
setprop sys.usb.config acm,diag,mtp,adb
It is preferred to clear these partitions by using these commands and restart your phone before flashing qcn files. I wiped wrong partitions (tz)using these commands and I got a HARD BRICK. YES A HARD BRICK so be very careful
Code:
dd if=/dev/zero of=/dev/block/mmcblk0p21
dd if=/dev/zero of=/dev/block/mmcblk0p22
dd if=/dev/zero of=/dev/block/mmcblk0p24
Restore by, where XX is the number and YY name of partition
Code:
dd if=/dev/block/[B]mmcblk0pXX/B] of=/sdcard/[B]YY[/B].epb
Example
Code:
dd if=/dev/block/mmcblk0p9 of=/sdcard/system.img
However, you can go ahead and clear these partitions only if you had a previous backup by blocks like EFS FILE EXPLORER. modemst1, modemst2, fsg, fsc,dbi, ddr, pad
Check which partition corresponds to which block by
Code:
ls -al /dev/block/platform/msm_sdcc.1/by-name
Once your device is connected, drivers and software installed,
You may need to first go to QPSTConfig which is located at QPST > Bin. There you will need to select port which will show your snapdragon model.
Go to QPST > Bin> QPSTServer.exe
1.A globe would appear in taskbar. Click on it and select software download.
2.Select port of your diagnostic mode in restore tab of software download
3. Once in software download, backup your current QCN (just as a backup to be safe)
4. Restore the QCN you found from google. Make sure it is device specific (use d850 QCN for d850 only)
5. Device would restart and automatically start to search 3g and LTE signals
Good luck
My original QCN was 31kb which clearly showed lost of data but the one that worked was about 500kb.
Lastly there are other methods to restore as well which I will look into so I can post in more details so your IMEI does not change.
Edit: You can do it by changing NV VALUE of 457 to your default value to keep your imei number as well
I will try to backup my radio partitions if someone needs help to fix their network issues or other possible solutions that could be found
HOW TO REVERT YOUR IMEI BACK TO ORIGINAL
1. Download EFS Professional. FROM HERE
2. Make sure you are rooted and busy box working.
3. Use commands as stated above to boot your phone in DIAG mode. This can be done anytime after connecting your phone to the PC.
4. Go to Qualcomm NV tools
5. Choose right port and connect.
6 Go to Secure Ops. tab and change imei from there. Make sure you have a full backup.
If this fails, you can use QXDM and go to NV tools and manually change your IMEI back to its real value. You will need to go to NV Values tab and then on side tab choose Security from All, and then change IMEI number to your real one. You can check details how to change values in QXDM in futher reading below. Samsung S5 thread explains it really well.
If you still are not sure, you can use QPST software. Go to NV manager and find your IMEI number after connecting the phone in diag mode. Usually it is 550 or 457 value.
Use Imei converter from attached files below and insert the converted values.
Good Luck
THREADS TO LOOK FOR FURTHER READ
Unlock Bands and how to boot into Diag mode All credits to @olokos for his guide
Unlock LTE bands and go into diag mode
All credits to @fffft for his guide
FOR BEST RESULTS WHICH I FOUND HAD MORE SUCCESS WITH
1. First understand the problem fully here
2. Flash a working qcn to your device
3. Wipe partitions as commands given above
4. restart
5. Flash a working qcn on it again. Preferably the same one
6. Check if you get signals now, if not then do a factory reset and see
Profit ? No
7. Install TOT stock 4.4.2 or Lollipop (I had more success with Lollipop)
8. Install a qcn from another device. Just to break all your signals (do at your own risk) I flashed a D855 qcn to my d850
9. Restart and wipe partitions
10. Reflashed working Qcn again
Profit ? No
It did not work till here so I moved to stock lollipop by flashing zip in TWRP. If you have TOT method, that is better.
So I went to flash Lollipop stock with modem of D850. (because it was zip and did not include modem. In TOT/ KDZ all partitions are flashed so you do not need to flash modem separately) So i wiped partitions again and then I flashed QCN using cracked version of Z3x Lg Tools twice. (same qcn but two times) and then restarted.
It restored everything back. Everything came to work fine
Z3X Cracked Download here
WHAT YOU CAN DO TO HELP OTHERS (needs root and busybox installed)
I suggest you make a backup of your EFS via TWRP & EFS TOOL before tinkering with hidden menu or anything at all. If you do these steps correctly, you do not risk of any damage to your device.
Download EFS Tool from here
http://forum.xda-developers.com/atta...6&d=1419867628
Main thread of it
http://forum.xda-developers.com/gala...546?styleid=18
1. go in backup tab
2. select all partitions
3. Select 3 partitions
backup modem, modemst1 and modemst2 and upload it for me so I can try to restore the settings to see if that works.
MAKE SURE YOU WRITE YOUR DEVICE MODEL when attaching those mentioned partitions AND DOUBLE CHECK IT AS FLASHING WRONG radios can permanently damage your device.
DEVICE I FIXED WAS D850 ATT Variant and had success with other variants as well
UPDATE
I have attached a D855 qcn with null imei. You will need to change your imei yourself which you can find by removing your battery. Make sure to make a backup before trying anything and I WILL BE NOT RESPONSIBLE
HISTORY --- JUST TO COMPARE IF YOU HAVE SIMILAR PROBLEM
hi there,
I am working to fix the problem many users have faced and therefore trying to find possible solutions. I need some partition images from you guys if you can provide me so I can try to fix the issues.
THE PROBLEM AND HOW IT STARTED :
I have got a D850 which I am using in Europe. The problem started when I inserted an LTE enabled sim and went to hidden menu to change my mode to LTE only, I was on Fulmics Rom 2.7 Lollipop at that time. Before that, ii network search, I could see all WCDMA, GSM and LTE bands used by different providers by manual search.
After changing it to LTE only, I could not see any signal bars and it started searching. As I was in an area where LTE signals were weak, so I thought maybe I need to change back to GSM/WCDMA/LTE from settings. Signals returned to normal but only to gsm. LTE and 3G were lost as searching for networks did not help at all.
I tinkered with hidden menu and selected GSM/WCDMA/LTE ( 3845#*850# ) from hidden menu
and
used this ( *#*#4636#*#* ) to change back to GSM/WCDMA/LTE from another hidden menu.
It didnot help.
I flashed different modems (one from kitkat and two versions from Lollipop) but that didnot help either.
I reverted back to KITKAT using TOT method and the WCDMA and LTE were lost forever when i tried to search manually. So I made an EFS backup and started tinkering with hidden method.
Actually I was not expecting that the values would be affected by using the hidden menu to fix my network to LTE only.
I then backup my EFS and tinkered with hidden menu and i was successful in bringing back LTE, however, I was stuck with no 3g.
Using build prop editor, I changed my operator from ATT to OPEN (as ATT does not show default selection menu for GSM/WCDMA/LTE in settings/ both hidden menus) which enabled the option by which I could changed my preferred network type.
In hidden menu, I just enabled VoLTE in LTE > Modem Settings > VoLTE On which brought back LTE.
Next I installed QPST & QXDM to check my NV values and IMEI.
All of those were perfectly fine. No problem at all.
Strangely all the NV values are right. I restored my EFS to old state where I didnot have LTE or 3g. The LTE was gone again.
I again enabled VoLTE from hidden menu and LTE came back.
See attached image for reference.
POSSIBLE SOLUTION :
I think the problem lies in ATT settings as it has preset operator settings which changes from GSM to WCDMA to LTE depending on its values.
Once I selected LTE only, I disabled the WCDMA and somehow broke the AT&T preset settings as you can not change preferred network from settings like D855 or other models. Somehow we need to re-enable these and one possible way would be to flash modemst 1 and modemst 2 from backup.
Please help me find the possible solution
PS : For all those who are wondering if i tried other sims and tried to use 4g/3g on another device. Yes i did and the problem is only in D850
I also made a proper working APN. Plus I check which network I am on by using *#*#4636#*#*
dd if=/home/med/Desktop/tz.img of=/dev/sdb6
Click to expand...
Click to collapse
ANY SUGGESTIONS ?[/U][/COLOR][/B] @hyelton
People who can not flash QCN need to break their Lg lock which is done by flashing someone else Twrp backup of same device on your phone. After this, you will be able to flash QCN without issues
Hnk1 said:
hi there,
I am working to fix the problem many users have faced and therefore trying to find possible solutions. I need some partition images from you guys if you can provide me so I can try to fix the issues.
THE PROBLEM AND HOW IT STARTED :
I have got a D850 which I am using in Europe. The problem started when I inserted an LTE enabled sim and went to hidden menu to change my mode to LTE only, I was on Fulmics Rom 2.7 Lollipop at that time. Before that, ii network search, I could see all WCDMA, GSM and LTE bands used by different providers by manual search.
After changing it to LTE only, I could not see any signal bars and it started searching. As I was in an area where LTE signals were weak, so I thought maybe I need to change back to GSM/WCDMA/LTE from settings. Signals returned to normal but only to gsm. LTE and 3G were lost as searching for networks did not help at all.
I tinkered with hidden menu and selected GSM/WCDMA/LTE ( 3845#*850# ) from hidden menu
and
used this ( *#*#4636#*#* ) to change back to GSM/WCDMA/LTE from another hidden menu.
It didnot help.
I flashed different modems (one from kitkat and two versions from Lollipop) but that didnot help either.
I reverted back to KITKAT using TOT method and the WCDMA and LTE were lost forever when i tried to search manually. So I made an EFS backup and started tinkering with hidden method.
Actually I was not expecting that the values would be affected by using the hidden menu to fix my network to LTE only.
I then backup my EFS and tinkered with hidden menu and i was successful in bringing back LTE, however, I was stuck with no 3g.
Using build prop editor, I changed my operator from ATT to OPEN (as ATT does not show default selection menu for GSM/WCDMA/LTE in settings/ both hidden menus) which enabled the option by which I could changed my preferred network type.
In hidden menu, I just enabled VoLTE in LTE > Modem Settings > VoLTE On which brought back LTE.
Next I installed QPST & QXDM to check my NV values and IMEI.
All of those were perfectly fine. No problem at all.
Strangely all the NV values are right. I restored my EFS to old state where I didnot have LTE or 3g. The LTE was gone again.
I again enabled VoLTE from hidden menu and LTE came back.
REQUEST , WHAT YOU CAN DO TO HELP (needs root and busybox installed)
I suggest you make a backup of your EFS via TWRP & EFS TOOL before tinkering with hidden menu or anything at all. If you do these steps correctly, you do not risk of any damage to your device.
Download EFS Tool from here
http://forum.xda-developers.com/atta...6&d=1419867628
Main thread of it
http://forum.xda-developers.com/gala...546?styleid=18
1. go in backup tab
2. select all partitions
3. Select 3 partitions
backup modem, modemst1 and modemst2 and upload it for me so I can try to restore the settings to see if that works.
See attached image for reference.
POSSIBLE SOLUTION :
I think the problem lies in ATT settings as it has preset operator settings which changes from GSM to WCDMA to LTE depending on its values.
Once I selected LTE only, I disabled the WCDMA and somehow broke the AT&T preset settings as you can not change preferred network from settings like D855 or other models. Somehow we need to re-enable these and one possible way would be to flash modemst 1 and modemst 2 from backup.
Please help me find the possible solution
PS : For all those who are wondering if i tried other sims and tried to use 4g/3g on another device. Yes i did and the problem is only in D850
I also made a proper working APN. Plus I check which network I am on by using *#*#4636#*#*
ANY SUGGESTIONS ?[/U][/COLOR][/B] @hyelton
Click to expand...
Click to collapse
Maybe the D850 does NOT have the bands that the carrier your trying to use it on? Flashing another modem wont enable bands the hardware does not have.
hyelton said:
Maybe the D850 does NOT have the bands that the carrier your trying to use it on? Flashing another modem wont enable bands the hardware does not have.
Click to expand...
Click to collapse
@hyelton
Update :
Please check the guide
Hnk1 said:
USE AT YOUR OWN RISK
This guide is intended for those individuals who can not use 3g or LTE but 2g works perfectly for them or they have lost their network and flashing different radios does not help
What do you need :
*Drivers installed
*USB debugging
*QPST (google it or google UNLOCK ALL BANDS QUALCOMM XDA and download from one of the forum there as it is banned)
*EFS BACKUP TOOL (available at xda or find link in history below)
* Device specific backup of QCN (FIND IT YOURSELF AS IT WILL CHANGE YOUR IMEI TOO)
*DIAG MODE ENABLED
This is how to enable diag mode via platform tools using ADB on LG devices
1) adb shell
2) su
3) echo 1 > /sys/devices/platform/lg_diag_cmd/diag_enable
4) setprop sys.usb.config acm,diag,mtp,adb
Once your device is connected, proper drivers and software installed,
Go to QPST > Bin> QPSTServer.exe
1.A globe would appear in taskbar. Click on it and select software download.
2.Select port of your diagnostic mode in restore tab of software download
3. Once in software download, backup your current QCN (just as a backup to be safe)
4. Restore the QCN you found from google. Make sure it is device specific (use d850 QCN for d850 only)
5. Device would restart and automatically start to search 3g and LTE signals
Good luck
My original QCN was 31kb which clearly showed lost of data but the one that worked was about 500kb.
Lastly there are other methods to restore as well which I will look into so I can post in more details so your IMEI does not change
I will try to backup my radio partitions if someone needs help to fix their network issues or other possible solutions that could be found
REQUEST , WHAT YOU CAN DO TO HELP (needs root and busybox installed)
I suggest you make a backup of your EFS via TWRP & EFS TOOL before tinkering with hidden menu or anything at all. If you do these steps correctly, you do not risk of any damage to your device.
Download EFS Tool from here
http://forum.xda-developers.com/atta...6&d=1419867628
Main thread of it
http://forum.xda-developers.com/gala...546?styleid=18
1. go in backup tab
2. select all partitions
3. Select 3 partitions
backup modem, modemst1 and modemst2 and upload it for me so I can try to restore the settings to see if that works.
MAKE SURE YOU WRITE YOUR DEVICE MODEL when attaching those mentioned partitions AND DOUBLE CHECK IT AS FLASHING WRONG radios can permanently damage your device.
DEVICE I FIXED WAS D850 ATT Variant
HISTORY
hi there,
I am working to fix the problem many users have faced and therefore trying to find possible solutions. I need some partition images from you guys if you can provide me so I can try to fix the issues.
THE PROBLEM AND HOW IT STARTED :
I have got a D850 which I am using in Europe. The problem started when I inserted an LTE enabled sim and went to hidden menu to change my mode to LTE only, I was on Fulmics Rom 2.7 Lollipop at that time. Before that, ii network search, I could see all WCDMA, GSM and LTE bands used by different providers by manual search.
After changing it to LTE only, I could not see any signal bars and it started searching. As I was in an area where LTE signals were weak, so I thought maybe I need to change back to GSM/WCDMA/LTE from settings. Signals returned to normal but only to gsm. LTE and 3G were lost as searching for networks did not help at all.
I tinkered with hidden menu and selected GSM/WCDMA/LTE ( 3845#*850# ) from hidden menu
and
used this ( *#*#4636#*#* ) to change back to GSM/WCDMA/LTE from another hidden menu.
It didnot help.
I flashed different modems (one from kitkat and two versions from Lollipop) but that didnot help either.
I reverted back to KITKAT using TOT method and the WCDMA and LTE were lost forever when i tried to search manually. So I made an EFS backup and started tinkering with hidden method.
Actually I was not expecting that the values would be affected by using the hidden menu to fix my network to LTE only.
I then backup my EFS and tinkered with hidden menu and i was successful in bringing back LTE, however, I was stuck with no 3g.
Using build prop editor, I changed my operator from ATT to OPEN (as ATT does not show default selection menu for GSM/WCDMA/LTE in settings/ both hidden menus) which enabled the option by which I could changed my preferred network type.
In hidden menu, I just enabled VoLTE in LTE > Modem Settings > VoLTE On which brought back LTE.
Next I installed QPST & QXDM to check my NV values and IMEI.
All of those were perfectly fine. No problem at all.
Strangely all the NV values are right. I restored my EFS to old state where I didnot have LTE or 3g. The LTE was gone again.
I again enabled VoLTE from hidden menu and LTE came back.
See attached image for reference.
POSSIBLE SOLUTION :
I think the problem lies in ATT settings as it has preset operator settings which changes from GSM to WCDMA to LTE depending on its values.
Once I selected LTE only, I disabled the WCDMA and somehow broke the AT&T preset settings as you can not change preferred network from settings like D855 or other models. Somehow we need to re-enable these and one possible way would be to flash modemst 1 and modemst 2 from backup.
Please help me find the possible solution
PS : For all those who are wondering if i tried other sims and tried to use 4g/3g on another device. Yes i did and the problem is only in D850
I also made a proper working APN. Plus I check which network I am on by using *#*#4636#*#*
ANY SUGGESTIONS ?[/U][/COLOR][/B] @hyelton
Click to expand...
Click to collapse
from where did you got the qcn file
adil.ali.503 said:
from where did you got the qcn file
Click to expand...
Click to collapse
Google depending on your device model.
D850 qcn
D855 qcn download
Or something on the lines of above
I had two at&t g3. (Both lost their qcn) , one d855 and now I'm using third d850. ( I almost lost qcn on this one too)
I realise that qcn is easily lost on d850 model as even rooting via kingroot can simply damage qcn.
I had to sell all others. Previous models qcn didnt enable 4g for me , however, i flashed these to older device and 4g started to work. And i flashed older qcn to this device and 4g stopped working.
So make sure you find a qcn which enables 4g with 3g n 2g.
I would suggest go to a tech guy in your area who works with unlocking phones and they usually use some kind of boxes to flash qcn.
Another way could be you request a friend whose 4g is working to make a backup and share it with you.
Lastly, find it online and flash it yourself.
You can also request NV values which wouldnt change imei (as long as you change the NV 457 value to 0)
Inbox me for more help.
Good luck
My imei is already 0 and the model is d850 and body is of d855
The problem is that I can't use 3g on it
2g and 4g works fine
Sent from my LG-D850 using Tapatalk
adil.ali.503 said:
My imei is already 0 and the model is d850 and body is of d855
The problem is that I can't use 3g on it
2g and 4g works fine
Sent from my LG-D850 using Tapatalk
Click to expand...
Click to collapse
I came here out of curiosity. Next time quote me if you expect a reply.
What you need to do is flash a QCN. I can try to repair your imei number and send you back.
What I will need is your imei number(remove your battery and see under it), model number and your qcn file. Make sure you inbox me these details and I will try to repair it for you.
Good Luck
Hnk1 said:
I came here out of curiosity. Next time quote me if you expect a reply.
What you need to do is flash a QCN. I can try to repair your imei number and send you back.
What I will need is your imei number(remove your battery and see under it), model number and your qcn file. Make sure you inbox me these details and I will try to repair it for you.
Good Luck
Click to expand...
Click to collapse
As I told you that the body of the cell is from d855 and the sticker on the back is also false one with the imei of a d855
Sent from my LG-D850 using Tapatalk
adil.ali.503 said:
As I told you that the body of the cell is from d855 and the sticker on the back is also false one with the imei of a d855
Sent from my LG-D850 using Tapatalk
Click to expand...
Click to collapse
I can provide you with a qcn for device d850 but make sure you backup your own. Tell me if you would need it.
Also, the best thing would be that you send me your qcn and i try to repair it and send it to you back,
But i think the best thing could be to provide you with NV values. let me see if i can work something out.
QCN for d850
https://www.sendspace.com/file/ak2hkl
Hnk1 said:
I can provide you with a qcn for device d850 but make sure you backup your own. Tell me if you would need it.
Click to expand...
Click to collapse
Can you confirm that 2g,3g and 4g is working with that qcn
And a question for safety that what can happen at most if something goes wrong
Sent from my LG-D850 using Tapatalk
adil.ali.503 said:
Can you confirm that 2g,3g and 4g is working with that qcn
And a question for safety that what can happen at most if something goes wrong
Sent from my LG-D850 using Tapatalk
Click to expand...
Click to collapse
MAKE A BACKUP OF YOUR QCN. either using QPST or using TWRP (TWRP from xda as it can also backup EFS)
I flashed many and i had none problems. As long as you do have a backup to go back to. There is no problem.
PS : Share your qcn and maybe I can try to repair it. I got NV values from my device.
If your friend has the same device. Grab qcn from him too and we can work something out as well
Hnk1 said:
MAKE A BACKUP OF YOUR QCN. either using QPST or using TWRP (TWRP from xda as it can also backup EFS)
I flashed many and i had none problems. As long as you do have a backup to go back to. There is no problem.
PS : Share your qcn and maybe I can try to repair it. I got NV values from my device.
If your friend has the same device. Grab qcn from him too and we can work something out as well
Click to expand...
Click to collapse
I already have a backup of efs I made by twrp
Is it all I've to do?
Sent from my LG-D850 using Tapatalk
adil.ali.503 said:
I already have a backup of efs I made by twrp
Is it all I've to do?
Sent from my LG-D850 using Tapatalk
Click to expand...
Click to collapse
Although it is enough but i will go ahead and make a backup of qcn using qpst.
Hnk1 said:
Although it is enough but i will go ahead and make a backup of qcn using qpst.
Click to expand...
Click to collapse
I'm uploading my efs to Dropbox, I'll give you the link than
Can I just restore the efs files if you can provide me coz I don't want to mess with qpst
It's a bit difficult to me as I'm just a noob
Sent from my LG-D850 using Tapatalk
Hnk1 said:
Google depending on your device model.
D850 qcn
D855 qcn download
Or something on the lines of above
I had two at&t g3. (Both lost their qcn) , one d855 and now I'm using third d850. ( I almost lost qcn on this one too)
I realise that qcn is easily lost on d850 model as even rooting via kingroot can simply damage qcn.
I had to sell all others. Previous models qcn didnt enable 4g for me , however, i flashed these to older device and 4g started to work. And i flashed older qcn to this device and 4g stopped working.
So make sure you find a qcn which enables 4g with 3g n 2g.
I would suggest go to a tech guy in your area who works with unlocking phones and they usually use some kind of boxes to flash qcn.
Another way could be you request a friend whose 4g is working to make a backup and share it with you.
Lastly, find it online and flash it yourself.
You can also request NV values which wouldnt change imei
Inbox me for more help.
PS : i have come up with severe viral conjuctivitis so i might not be able to help you till it clears up.
Good luck
Click to expand...
Click to collapse
Hi I have a D855 LG G3 and I have the same exact problem, my 2G works perfectly fine but I am no longer able to access LTE or 3g (signal shuts down when I switch to 3g or LTE mode, Service is disabled).
My IMEI is fine and is not lost... I can see it in About screen, I have tried installing different lollipop modems and even downgraded to Lollipop and Kitkat rom and even tried Cyanogenmod 12.1, I never had the signal back on.
Can you please share the LG D855 QCN? I have no idea where to get it, googling has not gotten me anywhere, I saw a SINGLE site where I could download it but it had a password.
adil.ali.503 said:
I'm uploading my efs to Dropbox, I'll give you the link than
Can I just restore the efs files if you can provide me coz I don't want to mess with qpst
It's a bit difficult to me as I'm just a noob
Sent from my LG-D850 using Tapatalk
Click to expand...
Click to collapse
Well, i will tell you step by step how to make a backup of QCN and how to flash QCN. It will be fine.
How did you manage to back it up ?
Mate you sent me EFS which means I need to use it on my device and then fix it and then send you.
Can you manage a QCN ?
It is very easy. Let me get back to you by night but I WILL PREFER QCN
pjl3dm said:
Hi I have a D855 LG G3 and I have the same exact problem, my 2G works perfectly fine but I am no longer able to access LTE or 3g (signal shuts down when I switch to 3g or LTE mode, Service is disabled).
My IMEI is fine and is not lost... I can see it in About screen, I have tried installing different lollipop modems and even downgraded to Lollipop and Kitkat rom and even tried Cyanogenmod 12.1, I never had the signal back on.
Can you please share the LG D855 QCN? I have no idea where to get it, googling has not gotten me anywhere, I saw a SINGLE site where I could download it but it had a password.
Click to expand...
Click to collapse
Check your inbox. Tell me the result. And always remember : BACK UP BACK UP BACK UP FIRST
pjl3dm said:
Hi I have a D855 LG G3 and I have the same exact problem, my 2G works perfectly fine but I am no longer able to access LTE or 3g (signal shuts down when I switch to 3g or LTE mode, Service is disabled).
My IMEI is fine and is not lost... I can see it in About screen, I have tried installing different lollipop modems and even downgraded to Lollipop and Kitkat rom and even tried Cyanogenmod 12.1, I never had the signal back on.
Can you please share the LG D855 QCN? I have no idea where to get it, googling has not gotten me anywhere, I saw a SINGLE site where I could download it but it had a password.
Click to expand...
Click to collapse
Did you checked your hangouts
Sent from my LG-D850 using Tapatalk
adil.ali.503 said:
Did you checked your hangouts
Sent from my LG-D850 using Tapatalk
Click to expand...
Click to collapse
here you go.
Just run restore via twrp and your imei should be fixed. Good luck
I will appreciate if you tell me if it worked for you!
Hnk1 said:
here you go.
Just run restore via twrp and your imei should be fixed. Good luck
I will appreciate if you tell me if it worked for you!
Click to expand...
Click to collapse
Sorry to say it doesn't work
Imei is still 0 and I can't get any 3g signals
I think its the problem with the frequency band
Thanks for your help ?
Sent from my LG-D850 using Tapatalk
I'm still getting 4G LTE signals but it seems that I cannot get any data at all (any website can't load). Will this help solve it?
Okay, who has followed my posts know my new Nexus 6P, which I bought from a guy wasn't recognizing my SIM card. (I'm apparently the second owner. He said that he imported the device so I assume that he was really the first owner)
Luckily I made it recognize the SIM card putting a tape on it at the SIM tray, but now my device keeps at No Service | Vivo.
Vivo is my carrier, but no matter what I do my Network Type at *#*#4636#*#* keeps at LTE/*I don't remember/CDMA. I've tried changing it in Settings/more/cellular network but didn't work either. Removing and putting SIM tray again didn't work as well.
Flashed factory image didn't work too. Also, flashing custom ROM didn't work.
Someone have a solution for it, please?
Since I fixed the unrecognized SIM with a simple tape I can believe something will fix this No Service trouble.
Had the same issue at my wifes old opo, the simpins inside the phone were broken. May yours are only bent if your lucky, hard to check without opening the backcover. Can you try another sim card first, friends, family or neighbors??? Or you need one tape more I had to replace the mobo. Took one of a broken phone cheap from the bay.
coremania said:
Had the same issue at my wifes old opo, the simpins inside the phone were broken. May yours are only bent if your lucky, hard to check without opening the backcover. Can you try another sim card first, friends, family or neighbors??? Or you need one tape more I had to replace the mobo. Took one of a broken phone cheap from the bay.
Click to expand...
Click to collapse
I'll try to tape it even more. I've checked over xda and a guy fixed it flashing February factory image. I'll try it as soon as I arrive home.
Debuffer said:
I'll try to tape it even more. I've checked over xda and a guy fixed it flashing February factory image. I'll try it as soon as I arrive home.
Click to expand...
Click to collapse
Hope you don't have to stay on it, good luck
Edit: is your simcardholder ok ?? May one site hangs and you don't have contact to the right pin.
Edit2: can you see the pins by using a bright flashlight ???
coremania said:
Hope you don't have to stay on it, good luck
Edit: is your simcardholder ok ?? May one site hangs and you don't have contact to the right pin.
Edit2: can you see the pins by using a bright flashlight ???
Click to expand...
Click to collapse
The device recognize the SIM, but it doesn't get network.
Debuffer said:
The device recognize the SIM, but it doesn't get network.
Click to expand...
Click to collapse
Yes, I get that, this was exactly my issue with the opo. Recognize but no service.
Your phone may be stuck on USA bands. The hidden menu apparently is buggy and once USA bands is selected by accident, you can't change it back. 7.1.2 was supposed to have added the ability to switch back to Auto, but I cannot confirm that. Look here. I know you are new, so to access the menu, youopen up the dialer and type this in- *#*#4636#*#*
I just noticed that I can switch to any (PRL) network in *#*#4636#*#*, but can't switch to LTE, GSM or WCDMA without the (PRL)...
v12xke said:
Your phone may be stuck on USA bands. The hidden menu apparently is buggy and once USA bands is selected by accident, you can't change it back. 7.1.2 was supposed to have added the ability to switch back to Auto, but I cannot confirm that. Look here. I know you are new, so to access the menu, youopen up the dialer and type this in- *#*#4636#*#*
Click to expand...
Click to collapse
I'm download it and very hopeful because it worked for many people... Anyway, this are the bands I've available for now:
United States
Cellular 800
PCS
Class 10 (800Mhz-Secondary)
Hopefully this PureNexus gonna fix this issue.
Debuffer said:
I'm download it and very hopeful because it worked for many people... Anyway, this are the bands I've available for now:
United States
Cellular 800
PCS
Class 10 (800Mhz-Secondary) Hopefully this PureNexus gonna fix this issue.
Click to expand...
Click to collapse
Sounds like you are stuck on USA bands. Good luck.
v12xke said:
Sounds like you are stuck on USA bands. Good luck.
Click to expand...
Click to collapse
My Nexus 6 (shamu), which works perfectly with the same Nano SIM, has all the Network Bands I quoted in my previous post + Class 15.
Not sure if my device should use Class 15, but I'm (was) using the same ROM on both (PureNexus Shamu and PureNexus Angler) and the angler doesn't work.
Download Chroma ROM to test it since the PureNexus quoted in the post you sent me is bootlooping in the Google Logo.
Just an EDIT...
I can select the Automatic bands selector, and it says that the Automatic was selected, which still doesn't give me any signal strenght.
Debuffer said:
Just an EDIT... I can select the Automatic bands selector, and it says that the Automatic was selected, which still doesn't give me any signal strenght.
Click to expand...
Click to collapse
In Chroma or PN? You may need to fastboot format your partitions, especially System coming from a custom ROM. Why not step back and fastboot format system, userdata and cache then reflash the custom PN ROM to try and get it booted. It also may take some time after changing bands to Auto. Maybe 5-10 minutes max. Let it settle.
v12xke said:
In Chroma or PN? You may need to fastboot format your partitions, especially System coming from a custom ROM. Why not step back and fastboot format system, userdata and cache then reflash the custom PN ROM to try and get it booted. It also may take some time after changing bands to Auto. Maybe 5-10 minutes max. Let it settle.
Click to expand...
Click to collapse
I'm now downloading a factory image for 6.0.1 then I'll flash PureNexus again. I read in the thread that it needs the 6.0.1 vendor to boot.
I'll flash this 6.0.1 stock then I'll flash PureNexus. Fingers crossed to this work.
Anyway, can we talk via Telegram? You look like know more than I and I would love to keep talking to you during this proccess.
I'm @Debuffer.
v12xke said:
In Chroma or PN? You may need to fastboot format your partitions, especially System coming from a custom ROM. Why not step back and fastboot format system, userdata and cache then reflash the custom PN ROM to try and get it booted. It also may take some time after changing bands to Auto. Maybe 5-10 minutes max. Let it settle.
Click to expand...
Click to collapse
And I meant I could select the Automatic Band in the latest 7.1.2 PN and/or stock rom.
Unhappily it didn't work.
Still No Service|Vivo
Just came from the tech and he tested the antenna. Everything is working great with the antenna. Anyway, I can't get any signal. He said maybe there's a problem in the SIM slot, and he showed me that the 6P is dual SIM
He told me to try finding a dual SIM tray and put my SIM in the slot 2.
Someone have any idea about what to do with it?
Hey guys, I purchased a LeEco Le Pro3 X727 for around $190. I plan on sending this phone out to Asia, so LTE band 41 and some others present in X720 is kinda important. I've read multiple threads, but there isn't really a concrete how-to on modems and LTE bands. I saw that the hardware is the same and something about the old way of unlocking the bootloader by flashing stock Chinese firmware and then flashing US firmware back to get back LTE bands for USA. Now my question is how can I make it so that in the end I have a Le Pro3 X727 with Chinese bands working. I saw something about losing network connectivity. I also want to install a custom ROM but I already know how to do that. Just need help with the baseband and getting the Chinese bands working.
To unlock bootloader you can simply do that in developper option mode after activating the usb debugging of your phone.
To unlock bands just follow saraprobe tutorial from here : https://forum.xda-developers.com/le-pro3/help/unlocking-bands-t3565979 or follow what im gonna say next.
Please dont forget to back up your phone especially the efs partition with TWRP if you planning to do some changes, it is really important in case u do something wrong, i'm not responsible if you do something wrong.
This is only gonna unlock lte bands of the phone.
it requires your phone to be rooted.
it require adb drivers(before doing the adb shell command in cmd try the command adb devices, if the phone is not showing up there when you doing it
just do *#*#76937#*#* on your phone and enable at port, try again "adb devices" command and your device should be here ).
the other methods to unlock band is using QPST/QXDM, you will find the software in the description of the video, and you can do what is in the following video to do it :
https://www.youtube.com/watch?v=GEO1UXuFLbI
Maybe it's not in english but if you follow what he is doing it's easy and, just when he is changing the nv item : 06828 , the number u need to write is "2062255987167" and press write.
To check if it's working download network signal guru in app store, and lock the band you want, like in the following vid :
https://www.youtube.com/watch?v=0lH4GtNfFmo
Good luck .
If it's not working then i might need your xqcn file to do a comparaison with my x720 file, and work with that.
DO NOT FORGET THAT A XQCN FILE CONTAIN YOUR IMEI AND SHOULDN't be shared on the internet,you have to send it to me through mp if you are willing to with or without IMEI
you can do that by backing up the xqcn like this, dont forget to mention what bands your phone is capable of as well, this might help me to unlock b28 on the phone :
https://www.youtube.com/watch?v=7i99xSIMcSI
Well, I enabled the bands I need, just need to test now if it actually works. I'll be finding out if it works in a week when I fly to Asia. Also, anyway to safely update the firmware to the latest with the latest radio and everything. I think some people said the firmware is interchangeable. I have LineageOS loaded onto it. Currently on 5.8.0.019s NA firmware. I see 5.9.0.026s CN is latest. Any tips?
zaiem93 said:
To unlock bootloader you can simply do that in developper option mode after activating the usb debugging of your phone.
To unlock bands just follow saraprobe tutorial from here : https://forum.xda-developers.com/le-pro3/help/unlocking-bands-t3565979 or follow what im gonna say next.
Please dont forget to back up your phone especially the efs partition with TWRP if you planning to do some changes, it is really important in case u do something wrong, i'm not responsible if you do something wrong.
This is only gonna unlock lte bands of the phone.
it requires your phone to be rooted.
it require adb drivers(before doing the adb shell command in cmd try the command adb devices, if the phone is not showing up there when you doing it
just do *#*#76937#*#* on your phone and enable at port, try again "adb devices" command and your device should be here ).
the other methods to unlock band is using QPST/QXDM, you will find the software in the description of the video, and you can do what is in the following video to do it :
https://www.youtube.com/watch?v=GEO1UXuFLbI
Maybe it's not in english but if you follow what he is doing it's easy and, just when he is changing the nv item : 06828 , the number u need to write is "2062255987167" and press write.
To check if it's working download network signal guru in app store, and lock the band you want, like in the following vid :
https://www.youtube.com/watch?v=0lH4GtNfFmo
Good luck .
If it's not working then i might need your xqcn file to do a comparaison with my x720 file, and work with that.
DO NOT FORGET THAT A XQCN FILE CONTAIN YOUR IMEI AND SHOULDN't be shared on the internet,you have to send it to me through mp if you are willing to with or without IMEI
you can do that by backing up the xqcn like this, dont forget to mention what bands your phone is capable of as well, this might help me to unlock b28 on the phone :
https://www.youtube.com/watch?v=7i99xSIMcSI
Click to expand...
Click to collapse
I got a x727, it´s on omnirom now, and I played around with band 20.
Following https://forum.xda-developers.com/le-pro3/help/unlocking-bands-t3565979 gave me Band 20 in Network signal guru, but doesn´t work.
Before I try QPST/QXDM, do you have an idea, which would be the correct number for me, is it the same, you mentioned above?
May be deleted, sorry!
HuaSamSony said:
I got a x727, it´s on omnirom now, and I played around with band 20.
Following https://forum.xda-developers.com/le-pro3/help/unlocking-bands-t3565979 gave me Band 20 in Network signal guru, but doesn´t work.
Before I try QPST/QXDM, do you have an idea, which would be the correct number for me, is it the same, you mentioned above?
Click to expand...
Click to collapse
I have the same issue as the OP. Flashed JUI which completely borked my LTE connectivity on LEX727. I tried the QPST fix, and they do show up in Network Signal Guru, but do not actively connect to those frequencies. I'm afraid we're SOL.
zaiem93 said:
To unlock bootloader you can simply do that in developper option mode after activating the usb debugging of your phone.
To unlock bands just follow saraprobe tutorial from here : https://forum.xda-developers.com/le-pro3/help/unlocking-bands-t3565979 or follow what im gonna say next.
Please dont forget to back up your phone especially the efs partition with TWRP if you planning to do some changes, it is really important in case u do something wrong, i'm not responsible if you do something wrong.
This is only gonna unlock lte bands of the phone.
it requires your phone to be rooted.
it require adb drivers(before doing the adb shell command in cmd try the command adb devices, if the phone is not showing up there when you doing it
just do *#*#76937#*#* on your phone and enable at port, try again "adb devices" command and your device should be here ).
the other methods to unlock band is using QPST/QXDM, you will find the software in the description of the video, and you can do what is in the following video to do it :
https://www.youtube.com/watch?v=GEO1UXuFLbI
Maybe it's not in english but if you follow what he is doing it's easy and, just when he is changing the nv item : 06828 , the number u need to write is "2062255987167" and press write.
To check if it's working download network signal guru in app store, and lock the band you want, like in the following vid :
https://www.youtube.com/watch?v=0lH4GtNfFmo
Good luck .
If it's not working then i might need your xqcn file to do a comparaison with my x720 file, and work with that.
DO NOT FORGET THAT A XQCN FILE CONTAIN YOUR IMEI AND SHOULDN't be shared on the internet,you have to send it to me through mp if you are willing to with or without IMEI
you can do that by backing up the xqcn like this, dont forget to mention what bands your phone is capable of as well, this might help me to unlock b28 on the phone :
https://www.youtube.com/watch?v=7i99xSIMcSI
Click to expand...
Click to collapse
Just a question.
I tried everything as described above on a LEX727 (5.8.019s (4GB 64 GB)). First: https://forum.xda-developers.com/le-pro3/help/unlocking-bands-t3565979, checking Band 20 additionally.
Same Problem as described there: LTE BC Config DIV #6829" didn't work. In Network guru Band 20 is listed, but no signal, Band 3 and 7 is working (Germany).
I learned, that my custom rom (Omnirom) didn´t work with diagnostic mode (driver not recognized), after restoring 5.8.019s I did your way above. In DIV #6828 there was already written, what I found by "Band calculator for activating Band 20 additionally. So I changed this in Config DIV #6829.
But nothing changed.
So, I did a backup of my QCN File before changing, I can do another backup now.
Maybe you can have a look to this files?
HuaSamSony said:
Just a question.
I tried everything as described above on a LEX727 (5.8.019s (4GB 64 GB)). First: https://forum.xda-developers.com/le-pro3/help/unlocking-bands-t3565979, checking Band 20 additionally.
Same Problem as described there: LTE BC Config DIV #6829" didn't work. In Network guru Band 20 is listed, but no signal, Band 3 and 7 is working (Germany).
I learned, that my custom rom (Omnirom) didn´t work with diagnostic mode (driver not recognized), after restoring 5.8.019s I did your way above. In DIV #6828 there was already written, what I found by "Band calculator for activating Band 20 additionally. So I changed this in Config DIV #6829.
But nothing changed.
So, I did a backup of my QCN File before changing, I can do another backup now.
Maybe you can have a look to this files?
Click to expand...
Click to collapse
Yes we can try, send me your qcn file through pm i will check with my x720 the value of the calibration files(rx,tx,gain freq,Pa,LNA) for b20 yours are probably missing but im not sure. i think they unlocked the bands in one plus like this.
Hi guys:
i have looked on google etc. but can seem to find a answer. I bought a LG V20 H910PR (from claro unlocked) im using it on AT&T everything is running super fine but can't get 4G LTE only HSPA+. Is that from the phone that does not have all the bands for ATT or is there is something I need to setup?
Thanks,
Did you change your APN?
-- Brian
runningnak3d said:
Did you change your APN?
-- Brian
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Yes the phone took the APN automatically
runningnak3d said:
Did you change your APN?
-- Brian
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It has the NXTGENPHONE one I chaged it also to phone but still HSPA+
I will look and see if that model uses the same RSA key. If it does, then you can try flashing the entire AT&T firmware.
runningnak3d said:
I will look and see if that model uses the same RSA key. If it does, then you can try flashing the entire AT&T firmware.
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Thanks
Your v20 supports most of att lte bands except band 17, all other should allow you to get lte with att. are you sure the apn is correct, and have you tried forcing the phone into lte mode?, use *#*#4636#*#*, if this menu does not work, download shurcutmaker from the playstore and search for network mode, that should allow you to open the network swtching menu.
runningnak3d said:
I will look and see if that model uses the same RSA key. If it does, then you can try flashing the entire AT&T firmware.
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Hi,
Were you able to find if the firmware can be installed?
siulmagic said:
Your v20 supports most of att lte bands except band 17, all other should allow you to get lte with att. are you sure the apn is correct, and have you tried forcing the phone into lte mode?, use *#*#4636#*#*, if this menu does not work, download shurcutmaker from the playstore and search for network mode, that should allow you to open the network swtching menu.
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Hi, I also have the same problem. The above mentioned code doesn't work, neither does the software you've mentioned. A bit more help will be appreciated.
Have the same problem on other operator. However if I reset the network settings and don't go into the network options it connects to 4G. If I just open the network settings, without touching anything, it locks to 3G/H+. There's no 4G option in network settings as mentioned. My APN is set up correctly. I did a bit of research and found these threads on Vietnamese forum, google translate was not helpful.
lgviet.com/forum/threads/mat-song-4g-ban-nao-ho-tro-minh-voi.66812/
lgviet.com/forum/threads/up-nhàm-rom-khác-khong-4g.67637/
lgviet.com/forum/threads/sua-loi-mat-3g-4g-lg-v20-h910pr.69517/
If you can't open the links, paste them in google and use google translate option. Any help would be appreciated.
vzeljkov said:
Have the same problem on other operator. However if I reset the network settings and don't go into the network options it connects to 4G. If I just open the network settings, without touching anything, it locks to 3G/H+. There's no 4G option in network settings as mentioned. My APN is set up correctly. I did a bit of research and found these threads on Vietnamese forum, google translate was not helpful.
lgviet.com/forum/threads/mat-song-4g-ban-nao-ho-tro-minh-voi.66812/
lgviet.com/forum/threads/up-nhàm-rom-khác-khong-4g.67637/
lgviet.com/forum/threads/sua-loi-mat-3g-4g-lg-v20-h910pr.69517/
If you can't open the links, paste them in google and use google translate option. Any help would be appreciated.
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the reset method working for me, but this behaviour is weird, thanks though, i really down last week because of this, got scammed h910 version lol
Please see my write-up here: https://forum.xda-developers.com/v20/how-to/hardware-modem-modem-firmware-ril-t3744860
-- Brian
I running to other issue, when im on data and then there's call coming, after that my phone locked to 2G, i dont know how many time i must reset network....
runningnak3d said:
Please see my write-up here: https://forum.xda-developers.com/v20/how-to/hardware-modem-modem-firmware-ril-t3744860
-- Brian
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Click to collapse
Is it safe to root/flash ROMs onto H910PR (it has V10j-CLR-PR software) using the H910 methods mentioned here?
Dhikavolution said:
I running to other issue, when im on data and then there's call coming, after that my phone locked to 2G, i dont know how many time i must reset network....
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Unfortunately I have the same issue, really disappointing. I'll try messaging the seller on aliexpress or I'll try to get in touch with the service on that Vietnamese forum I mentioned earlier. It is obviously software-side error so I am hoping this can be solved.
Also, you can go to service menu by typing *#546368#*910#.
Edit: After a bit of research I came across this thread: https://forum.xda-developers.com/lg-g3/help/lte-option-network-selection-t2827499
It is for LG G3 but the problem is the same. Basically Field test-Modem Settings-RAT selection - GSM/CDMA/LTE is a temporary fix. Other methods require root.
In the Field Test - PDP Setting - APN setting I have "LTE attach profile" which is hidden in the normal Network Settings menu. Don't know will modifying this to match my carrier's APN will change anything.
If you are still ARB 0, then you can use the H910 method. If you are ARB 1 or greater you will have to wait for the firehose method.
vzeljkov said:
Have the same problem on other operator. However if I reset the network settings and don't go into the network options it connects to 4G. If I just open the network settings, without touching anything, it locks to 3G/H+. There's no 4G option in network settings as mentioned. My APN is set up correctly. I did a bit of research and found these threads on Vietnamese forum, google translate was not helpful.
lgviet.com/forum/threads/mat-song-4g-ban-nao-ho-tro-minh-voi.66812/
lgviet.com/forum/threads/up-nhàm-rom-khác-khong-4g.67637/
lgviet.com/forum/threads/sua-loi-mat-3g-4g-lg-v20-h910pr.69517/
Hello, I am new to the site, something similar happens to me, I have an LG V20 H910, with the AT&T system it allowed me to select the 4G mode in the mobile networks option, now I changed the system for the company CLARO Puerto Rico And I don't get the 4G option in the settings, I only get 2G and 3G. It does not let me enter the hidden menu either, it tells me that it does not work on this device, I can not solve with the combination * # 546368 # * 910 #, I select the option only LTE, the coverage goes away and it comes back in 3G. Please, if someone solved this problem can you help me?
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H910PR - How to root & install any ROM! (all lineage ROMs verified)
Hey guys! :D I've been struggling over the weekend to get my H910PR rooted w/ a custom ROM installed. I kept getting kernel panics saying 'modem crashed' but was finally able to figure it out. Step 1 - Root / TWRP I followed these steps...
forum.xda-developers.com