Database Users

Guide to get LG Quantum works on Rogers Canada Network including MMS

After spending long nights of investigations, I here present the solution for those LG Quantum users like who want to get onto Rogers Canada Network.
So far I have done 2 LG Quantums and all works fine for both data and MMS.
Here are the steps:
1. Download the attached LGC900KB_100927_MP.zip and extract it somewhere. You will get LGC900KB_100927_MP.dll.
2. Goto nasirahmed's post regarding LG Quantum's original firmware thread. (Great job, nasirahmed!)
http://forum.xda-developers.com/showthread.php?t=935605
Download the LG C900K Australia version firmware and of course "LGDP2 V36 UMTS Setup" tool.
3. Follow the steps in nasirahmed's instructions to flash the LGC900K firmware. When you are asked for "DLL Selection", pick the one you have just extracted.
4. If everything goes well, you should have the C900K firmware pre-nodo version.
5. Start Zune and let it upgrade your firmware all the way to Mango. Be patient, it's a long process (about 1 hour).
6. Now you should have C900K mango on your phone, go to dialer and dial ##634# to install the MFG tool.
7. Disconnect USB and connect Wifi. Goto MarketPlace and download LG's Network Setup(In the LG App Store section).
8. Start the Network Setup tool it'll say something like "setttings changed, has to reboot". Let it reboot.
9. Then start MFG tool, password "277634#*#", "Engineering" -> "Other Options" -> Pick Registry editor.
Change the following key to 0.
LM_LOCAL_MACHINE\Software\LGE\DYNPROV\XMLList
Key = "RGS_CA_302_720"
Type = DWORD
10. Exit the MFG tool. Then run Network Setup again, it will reboot again.
11. Now you should have the Roger's Profile everything set up including the MMS.
12. Enjoy!
p.s.
The reason why it has to be C900K:
Only the C900K has the required the application lge_dynprovapp.exe to do dynamic provisioning. The Bell and AT&T ones doesn't include the file in \windows.
The reason for my DLL:
The original DLL for C900B or C900 or C900K will not let you do cross model flash. My version will let you flash across C900-C900B-C900K.

thanks, I'm thinking this might also be useful in the future if the at&t or the telstra versions get the tethering update but bell doesn't.

Thanks a lot for this! Flashing between C900/B/K with provided .DLL and LGDP2 V36 UMTS Setup tool works smootly!
Unfortunately flashing to different firmware didn't fix my issue. C900 is not accepting SIM, but repeatedly prompt for PUK code. I'm almost ready give my money for Octopus or similar tool, after trying unlock codes and flashing with different firmwares...

This worked great for me once I figured out the nuances to Nasirahmed's instructions but there are a couple of areas that I got stuck on.
Here are Nasirahmed's instructions from http://forum.xda-developers.com/showthread.php?t=935605 with some notes in red so you don't waste time uninstalling and reinstalling drivers and software like I did trying to get this to work:
1. Download LGDP2 V36 UMTS Setup and extract, go to LGDP2_31_INCLUDE_LGDP1_Setup folder and install the exe (use serial number). Now copy all the files from DOWNLOAD folder and paste on C:\DOWNLOAD (overwrite if needed).
2. Install LG United Modem Driver, connect the phone to PC through USB cable and let the drivers to be installed. USB 1.1 is recommended. (note: phone has to be in Emergency Download mode at this point to get the drivers to install.. power off phone, then press Volume Down, Camera, and Power Button at the same time to get in Emergency Download mode.)
3. You'll need firmware in DZ format and the correct DLL for your model.
(note: Unplug phone from USB)
4. Open LGDP2_V36_UMTS from C:\DOWNLOAD, select UMTS in Division and click OK.
5. Select port (check Device Manager for LG USBModem Port number), you can set a range from easy select or select manually. Select DLL and select firmware in Downlaod Configuration. Click OK. (note: You need your phone plugged into USB in Emergecy Download mode to find the port number in Device Manager... otherwise, just click ALL under easy select. Also, don't worry about the "Can't find Monitor Port!" warning )
6. Click START in main window and connect the phone to USB cable in Emergency download mode(VOL+CAM+PWR). (note: Make sure phone is not plugged into USB before you click start, then plug it back in AFTER after you click start. The update will then start automatically and is finished after the phone reboots into Windows.)

Hi,
I live in INDIA, currently i have a AT & T unlocked LG Quantum ?
I am interested in trying the above flashing ?
By what way, it will help me. ?
Is there any advantage in flashing c900 K version over c900 ?
Please let me know.

yakaaithiri said:
Hi,
I live in INDIA, currently i have a AT & T unlocked LG Quantum ?
I am interested in trying the above flashing ?
By what way, it will help me. ?
Is there any advantage in flashing c900 K version over c900 ?
Please let me know.
Click to expand...
Click to collapse
Not sure if this will help you much.
As far as i remember, most of the indian provider's profiles are already in the stock rom. You just need MFG app to set the correct one.
Sent from my LG-P990hN using xda premium

chinabull, using the 900k firmware, what radio and firmware version do you end up with after all the mango and post mango updates?

LG setup tool??
I have an unlocked quantum and have followed along with no problems untill I need to get the LG network setup tool. I can't find it or access it anywhere. I tried marketplace after i did the firmware update to the australia rom. I found a place to get the tool .xap file but cant get it onto the phone. Anyone can help?
Oh and I'm in Canada trying to get the quantum on Rogers.

did you folks on the flashed telstra ROM get the wifi tethering update notice too?
edit, flashed the ROM myself, yes, you do get the tethering update.

Does this flashing to Australian ROM solves the problem of Caller ID on rogers network for LG quantum?
Caller ID is more important for me than the MMS, i only want to do this if it fixes caller id.
Thanks

bobzero said:
did you folks on the flashed telstra ROM get the wifi tethering update notice too?
edit, flashed the ROM myself, yes, you do get the tethering update.
Click to expand...
Click to collapse
Might be a reasonable way to get the wifi tethering update. I just got a reply back from LG Canada saying:
"Unfortunately we have been told that the phone will not support tethering and this cannot be added through an update."
I guess LG Canada figures the quantum can't get wifi tethering?

M_SK said:
Does this flashing to Australian ROM solves the problem of Caller ID on rogers network for LG quantum?
Caller ID is more important for me than the MMS, i only want to do this if it fixes caller id.
Thanks
Click to expand...
Click to collapse
Would also like to know this. Does the Telstra ROM fix the caller ID issue on the Fido/Rogers network?

I personally don't use this specific phone regularly.
I did it purely because I promised my friends to help them to fix the MMS issue.
Just talked to them and they did mentioned about the caller id sometimes works and sometimes doesn't.
If you are talking about similar issue, then probably no.

chinabull said:
After spending long nights of investigations, I here present the solution for those LG Quantum users like who want to get onto Rogers Canada Network.
So far I have done 2 LG Quantums and all works fine for both data and MMS.
Here are the steps:
1. Download the attached LGC900KB_100927_MP.zip and extract it somewhere. You will get LGC900KB_100927_MP.dll.
2. Goto nasirahmed's post regarding LG Quantum's original firmware thread. (Great job, nasirahmed!)
http://forum.xda-developers.com/showthread.php?t=935605
Download the LG C900K Australia version firmware and of course "LGDP2 V36 UMTS Setup" tool.
3. Follow the steps in nasirahmed's instructions to flash the LGC900K firmware. When you are asked for "DLL Selection", pick the one you have just extracted.
4. If everything goes well, you should have the C900K firmware pre-nodo version.
5. Start Zune and let it upgrade your firmware all the way to Mango. Be patient, it's a long process (about 1 hour).
6. Now you should have C900K mango on your phone, go to dialer and dial ##634# to install the MFG tool.
7. Disconnect USB and connect Wifi. Goto MarketPlace and download LG's Network Setup(In the LG App Store section).
8. Start the Network Setup tool it'll say something like "setttings changed, has to reboot". Let it reboot.
9. Then start MFG tool, password "277634#*#", "Engineering" -> "Other Options" -> Pick Registry editor.
Change the following key to 0.
LM_LOCAL_MACHINE\Software\LGE\DYNPROV\XMLList
Key = "RGS_CA_302_720"
Type = DWORD
10. Exit the MFG tool. Then run Network Setup again, it will reboot again.
11. Now you should have the Roger's Profile everything set up including the MMS.
12. Enjoy!
p.s.
The reason why it has to be C900K:
Only the C900K has the required the application lge_dynprovapp.exe to do dynamic provisioning. The Bell and AT&T ones doesn't include the file in \windows.
The reason for my DLL:
The original DLL for C900B or C900 or C900K will not let you do cross model flash. My version will let you flash across C900-C900B-C900K.
Click to expand...
Click to collapse
Hi can you make a DLL that will allow us to flash the Optimus 7 rom to our quantum. They both share the same hardware spec.

yakaaithiri said:
Hi can you make a DLL that will allow us to flash the Optimus 7 rom to our quantum. They both share the same hardware spec.
Click to expand...
Click to collapse
I'd be really wary of doing this, there are some differences 1) capactive vs physical windows button, 2) hardware keyboard.

I agree. If you want to flash different variant of firmware on your optimus 7, i can probably help.
Sent from my LG-P990 using xda premium

Hi bobzero, chinabull, and other Canadian Quantum users. I guess we all got the phone on Bell firesale. I unlocked it and moved to Speakout (Rogers) network now, but since I can't update all APN settings maps are not working. I'm not sure if you have similar problem. They load over home wireless but not when I'm using Speakout data.
My understanding is that here mentioned procedure would solve MMS issue so I was wondering would this help with maps issue too?
Issue is that I can't change all APN proxy values. I unlocked and moved one Android phone to Speakout recenty but since I had control over all APN settings maps are working great.
If this update doesn't help with maps is there any other way to update APN settings?
Edit: To clarify, when I open MFG I don't have any xml file to chose from under network configurations.
Thanks

CHINABULL, with the Telstra ROM, do you happen to know if text messages are received with the wrong time stamp as they are with the bell ROM ? thank you

chinabull said:
I agree. If you want to flash different variant of firmware on your optimus 7, i can probably help.
Sent from my LG-P990 using xda premium
Click to expand...
Click to collapse
hi Chinabull,
Just a question out of curiosity, is there a chance to flash a Optimus 7 Jil Sanders ROM to our Quantum.?
Can you make a DLL for the same ?

Yes, just confirmed the Time stamp issue is still there. But it seems it doesn't affect threading.
Sent from my LG-C900k using XDA Windows Phone 7 App

[Help Pls] LG V20 VS995 after Root No GSM Signal - Service Disabled - No Service

Hello All,
For the past 3 weeks, I was reading threads and trying to solve the issue, but no luck. So please help me.
My problem/story started when I have ordered an LG V20 US996 from china, everything was working. I wanted to root it so I have tried this https://forum.xda-developers.com/v20/how-to/v20-h915us996-dirtyelf-bootloader-t3568013 and it worked, but I have lost the GSM Signal
I have tried to fix the issue by going to *#*#4636#*#* -> Phone information, but the US996 rom can’t access this menu. So I have tied to flash LineageOS for US996 it has started but the touch didn’t work so I have used an OTG Mouse, I went to *#*#4636#*#* but no result
After a long search on the internet I have come on a thread that suggest to see the original model of the phone (because as they said in china they may change the phone version), so I have checked the motherboard and I have found out that my phone is VS995.
But when I enter the LGUP or UPPERCUT it says that it is US996, I only can flash US996 KDZ ROM. However, after I went to ##PROGRAM996 I hit there reset (I don’t know exactly where) the phone restarted and now it shows in LGUP that it is VS995
So I have flashed using UPPERCUT VS99512A_06_1114_ARB00.kdz and no result still no GSM Signal then I have rooted the phone using https://forum.xda-developers.com/v20/development/ls997vs995h910-dirtysanta-bootloader-t3519410
I have flashed back the original EFS, no result still no GSM Signal
So I have Installed LineageOS for VS995 in order to access *#*#4636#*#* (because I couldn’t access any hidden menu form the VS995 original dialer) after Installing LineageOS the touch screen didn’t work I have an OTG Mouse, I went to *#*#4636#*#* -> Phone information, I Turn on the Radio but the still no GSM Signal
I have tried flushing multiple kernels and ROMs but no luck
I even tired this https://forum.xda-developers.com/v20/how-to/manual-program-sprint-ls997-v20-t3557676 but no luck, I couldn’t contact Verizon for the MSID number because I live in Lebanon
P.S: I have an IMEI number
I am going crazy here
Please help me

i have also tried this https://forum.xda-developers.com/v2...-ls997-v20-t3557676/post71315675#post71315675
and didn't work

i have no signal problem too, after doing firmware update using wifi, now my VS995 won't register to GSM/LTE network and it says Sim Card is not from Verizon...
how to activate this phone? i'm not in USA as your problem i cannot activate the VS995 using Verizon services,..
what should we do? to activate manually without the Verizon simcards??

Mine was showing no signal until I made a call, then it worked. I'm in the US, though.
VS995
LineageOS 14.1
Verizon

Habe you tried changing to Global. I am in the UK and have a vs995 and i am getting the not a verizon sim (which you can ignore). My problem is that using my contract carrier (EE) i cannot access 4G only 3G GSM but if i use a different carrier sim (O2) 4G/LTE is working.

hey..
can anyone pls share the qcn for vs995..?

LG H910PR on AT&T LTE?

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
Click to expand...
Click to collapse
Yes the phone took the APN automatically

runningnak3d said:
Did you change your APN?
-- Brian
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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
Click to expand...
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....
Click to expand...
Click to collapse
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?
Click to expand...
Click to collapse

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

[Q] US996 on Verizon issues

I have several issues with my US996 on Verizon, running LineageOS 14.1. (I'm not asking in the LOS threads because I figure more people here know the details of this device)
The main problem is I can't get SMS to work unless I set the preferred network type to CDMA or CDMA/EVDO only. I have been using the "VZWINTERNET" APN.
Any time I set an option that includes LTE (including the "Global" setting), SMS/MMS stops working.
Also, the signal indicator works strangely, oftentimes when I have strong signal the signal indicator shows 0 bars.
Lastly, many of the fields in Settings/phone info/SIM Status are blank, eg phone number, signal strength and service state. (Perhaps this is a CDMA/Verizon idiosyncracy since the SIM is not the primary auth to the legacy CDMA network?)
Do I need to flash the VS995 radio to this device to address these things? Is that even feasible? What about what Verizon calls "Advanced Calling" options? Ideally I would love to have VoLTE and WiFi calling as well.
Thanks.

Exabyter said:
I have several issues with my US996 on Verizon, running LineageOS 14.1. (I'm not asking in the LOS threads because I figure more people here know the details of this device)
The main problem is I can't get SMS to work unless I set the preferred network type to CDMA or CDMA/EVDO only. I have been using the "VZWINTERNET" APN.
Any time I set an option that includes LTE (including the "Global" setting), SMS/MMS stops working.
Also, the signal indicator works strangely, oftentimes when I have strong signal the signal indicator shows 0 bars.
Lastly, many of the fields in Settings/phone info/SIM Status are blank, eg phone number, signal strength and service state. (Perhaps this is a CDMA/Verizon idiosyncracy since the SIM is not the primary auth to the legacy CDMA network?)
Do I need to flash the VS995 radio to this device to address these things? Is that even feasible? What about what Verizon calls "Advanced Calling" options? Ideally I would love to have VoLTE and WiFi calling as well.
Thanks.
Click to expand...
Click to collapse
If youre device is abr0 you can use the patched dll version of lg up. https://forum.xda-developers.com/attachment.php?attachmentid=4233875&d=1502007613 to flash vs955 firmware. I have found that the this version VS9951BA01 is the one has fastboot mode and can get to recovery if you want to use dirty santa on it. or if you get to the you have 9 attempts of 10 to enter the passcode. you will then need to factor reset to get the data formated. But this link has the full instructions. https://forum.xda-developers.com/v20/how-to/guide-patch-lgup-to-unlock-features-t3652222

Drewc4xx said:
If youre device is abr0 you can use the patched dll version of lg up. https://forum.xda-developers.com/attachment.php?attachmentid=4233875&d=1502007613 to flash vs955 firmware. I have found that the this version VS9951BA01 is the one has fastboot mode and can get to recovery if you want to use dirty santa on it. or if you get to the you have 9 attempts of 10 to enter the passcode. you will then need to factor reset to get the data formated. But this link has the full instructions. https://forum.xda-developers.com/v20/how-to/guide-patch-lgup-to-unlock-features-t3652222
Click to expand...
Click to collapse
Thanks for that tip, I will read up on it a bit later.
The main reason I got a US996 rather than a VS995 is the lack of an officially unlockable bootloader on the VZW variant and having to use an exploit to unlock/root it which only works on old firmware leading me into a potential trap if the device ends up in a state I can't either unlock/root or return to stock from.
I already unlocked the US996 bootloader - will that get reset if I flash a stock kdz onto it?
I tried using LGup shortly after I got the phone but I was having problems getting it to work on my Win7 workstation, perhaps I had the wrong version..

Ls997 Invalid sim after update oreo

My ph is lg v20 ls997!! I dont know its ver, bootloader, lock or unlock i only know android 7.. and i use gsm network (not sprint)(before use when power on its show hand free activation) ?? Yesterday i update to oreo from ota update!! After Update successful all are smooth but simcard show invalid sim and i cant do anything!! Can u guys solve pls bro!! Sry for my nub english ?

ThantSinTun said:
My ph is lg v20 ls997!! I dont know its ver, bootloader, lock or unlock i only know android 7.. and i use gsm network (not sprint)(before use when power on its show hand free activation) ?? Yesterday i update to oreo from ota update!! After Update successful all are smooth but simcard show invalid sim and i cant do anything!! Can u guys solve pls bro!! Sry for my nub english ?
Click to expand...
Click to collapse
Now My Verison Is LS99720a pls solve i need to downgrade or purchase to sprint?? My country hav no sprint carrier

Well, you are kinda boned. There is no LS997 KDZ so you can't downgrade, and you can't use the VS995 KDZ since you are ARB 1.
Lesson learned, don't ever take an OTA update -- period -- rooted or not unless you are not rooted, AND you are using a carrier branded phone ON the carrier it was intended for.
-- Brian

runningnak3d said:
Well, you are kinda boned. There is no LS997 KDZ so you can't downgrade, and you can't use the VS995 KDZ since you are ARB 1.
Lesson learned, don't ever take an OTA update -- period -- rooted or not unless you are not rooted, AND you are using a carrier branded phone ON the carrier it was intended for.
-- Brian
Click to expand...
Click to collapse
Any other setting for invalid sim?? When power on Show ooredoo sim i use and 3 second later show invalid sim any service prevent ?? And i wanna know my device is root or no root '' bootloader unlocked or locked?? Where i check ? Pls help bro

I have the same issue. Downloaded the update and now invalid sim. Can't use phone txt or internet etc. Nothing mobile. Is there any fix for this? Who's fault is this? If my phone is now destroyed, can I get somebody to replace it? LG? Android? Phone was sprint. Used with cricket for around a year until this need the other day. Neither carrier knows how to fix. Thanks

I also have an LS997 GSM Unlocked (I bought it like this, not sure how it was done) and it was still unlocked after update to Oreo LS99720a. I didn't update it while it had the sim inside, and I factory reset after Oreo update. Try toggling network mode in settings to LTE/GSM/WCDMA and between CDMA/LTE + EvDO, but keep it on LTE/GSM/WCDMA. If you didn't properly unlock it, this may be the reason. If you can also see the CDMA Subscription option, set it to RUIM/SIM from NV. You could try DFS CDMA Tool 14 to change this if you can access DIAG mode from the hidden menu. I'm thinking the Sprint-TMobile merger (will be T-Mobile) will result in horrible OTA unlocking methods like they do currently instead of SIMCK, NCK, NSCK, or SIMCK. They'll likely rebrand the LS997 to T-Mobile and introduce their OTA unlock.
For now, try this:
Go into the phone dialer and type: 5689#*997#
Go to Field test > Modem Settings >RAT Selection > SELECT: GSM/WCDMA/LTE Auto
If it doesn't work, select LTE/WCDMA, then toggle back to GSM/WCDMA/LTE Auto
If it still doesn't work, remove the sim and try these steps above without the SIM, then retry.
Don't forget to update your APN settings for your carrier.

patato21 said:
I also have an LS997 GSM Unlocked (I bought it like this, not sure how it was done) and it was still unlocked after update to Oreo LS99720a. I didn't update it while it had the sim inside, and I factory reset after Oreo update. Try toggling network mode in settings to LTE/GSM/WCDMA and between CDMA/LTE + EvDO, but keep it on LTE/GSM/WCDMA. If you didn't properly unlock it, this may be the reason. If you can also see the CDMA Subscription option, set it to RUIM/SIM from NV. You could try DFS CDMA Tool 14 to change this if you can access DIAG mode from the hidden menu. I'm thinking the Sprint-TMobile merger (will be T-Mobile) will result in horrible OTA unlocking methods like they do currently instead of SIMCK, NCK, NSCK, or SIMCK. They'll likely rebrand the LS997 to T-Mobile and introduce their OTA unlock.
For now, try this:
Go into the phone dialer and type: 5689#*997#
Go to Field test > Modem Settings >RAT Selection > SELECT: GSM/WCDMA/LTE Auto
If it doesn't work, select LTE/WCDMA, then toggle back to GSM/WCDMA/LTE Auto
If it still doesn't work, remove the sim and try these steps above without the SIM, then retry.
Don't forget to update your APN settings for your carrier.
Click to expand...
Click to collapse
Carrier Signal show bro ph know carrier too but (invalid sim) still show

Go to the Sprint store (a legit Sprint owned one) and either get a compatible sim or have them fight extra hard to activate the sim you currently have...and idk if your still with Sprint or not...
---------- Post added at 06:12 PM ---------- Previous post was at 06:10 PM ----------
Also if you have the receipt you can try and get the sim unlock code from Sprint but since your not in a contract idk if they will give it to you...

Sprint does not have unlock codes. All you have to do is chat with their international division and they'll uicc unlock it for you.
This is important. Ask them to lock it from their end then ask them to unlock it. If your Sprint phone is paid off and clear then they will unlock it for free to use it on TMO or at&t

I've tried they keep saying that the phone is still unlocked on there end

I can't find these items!
Thanks for your reply.
I have the same exact issue. I tried your method to reach the hidden menu. I only have:
- Device Test
- ELT Test
- Factory Reset
- Log Service
Is there something I am missing?
patato21 said:
I also have an LS997 GSM Unlocked (I bought it like this, not sure how it was done) and it was still unlocked after update to Oreo LS99720a. I didn't update it while it had the sim inside, and I factory reset after Oreo update. Try toggling network mode in settings to LTE/GSM/WCDMA and between CDMA/LTE + EvDO, but keep it on LTE/GSM/WCDMA. If you didn't properly unlock it, this may be the reason. If you can also see the CDMA Subscription option, set it to RUIM/SIM from NV. You could try DFS CDMA Tool 14 to change this if you can access DIAG mode from the hidden menu. I'm thinking the Sprint-TMobile merger (will be T-Mobile) will result in horrible OTA unlocking methods like they do currently instead of SIMCK, NCK, NSCK, or SIMCK. They'll likely rebrand the LS997 to T-Mobile and introduce their OTA unlock.
For now, try this:
Go into the phone dialer and type: 5689#*997#
Go to Field test > Modem Settings >RAT Selection > SELECT: GSM/WCDMA/LTE Auto
If it doesn't work, select LTE/WCDMA, then toggle back to GSM/WCDMA/LTE Auto
If it still doesn't work, remove the sim and try these steps above without the SIM, then retry.
Don't forget to update your APN settings for your carrier.
Click to expand...
Click to collapse