Database Users

F320K F320L F320S no network problem after flashing original kdz

I had a problem with my korean version LG G2 (i messed up some system files and i was stuck at reboot), i had to reflash the original kdz system file, and then i had to hack the phone network, and doing this also fixed all the network connectivity problems i had previously, which i tough was hardware but apperently wasn't.
I had to make extended searches to restore my phone to a working state, so i wanted to create a small guide for anyone interested in completly resetting phone to original and change to international network, this might work with D802 or other models too, but i have no idea, so try at your own risks, i am sure it will work on all the korean versions of the LG G2
Before you start for safety make a complete back up of your system
but most important backup up your QCN and backup your modem.img modemst1.img and modemst2.img all three of them in a safe place, you might need them if you want to restore phone basebands to old state, and i highly reccomend you do.
Backup is a very important precaution, please don't make me responsible for lost stuff, your internal SD will be completly erased, so backup everything you need, this will wipe clean everything on your phone.
If you are interested in where to get kdz files
http://csmg.lgmobile.com:9002/csmg/b2c/client/auth_model_check2.jsp?esn=
and write your phone IMEI after the = (found in settings or on the serial number of phone, under battery, korean version has battery removable)
Write down your imei because you are gonna need it again
Then to flash the kdz you can find tutorials on XDA
You should be on 4.4.2 when you are done (unless there is a 4.5 lollipop OTA in the future, finger crossed)
anyway after flashing frimware, the phone will only recognize branded SIM cards of the korean networks depending on what version you installed.
So if you want your phone to be international, and with all the sensors working and so on, you have to root the rom, install a recovery with autorec from cloudyfa
enter recovery and flash this http://pan.baidu.com/s/1jIe5o pass: us56
this is a link i found on a chinese forum, i downloaded the F320LSK_EDGE_V3.zip
after reboot give sometime for the mobile to find network, it will need 5minutes the first time, it did for me, after everything working perfectly
the only thing is your imei will be reset to 0
to fix this
http://www.droidviews.com/how-to-backup-and-restore-lost-imei-on-lg-g2/
the second part of this guide
I think this will help a lot of people with network problems, or those who have bricked and wasnt to restore the phone to a working state.
also after you are done you can install any rom you'd like, i'm on cloudyG3 and everything is flawless, just don't flash the baseband like reccomended, the proper baseband is the one i linked
I have no problems with wifi to 3G switching, i have no problem with 3G whatsover, there should be no problem also with 4G but i can't confirm that, haven't tried GPS extensivly yet, but it seems to be fine.
For what i can understand these files that you need to flash are the basebands of the 802 international model, so in theory this should fix problems for other models too, but i haven't tested, so do at your own risk

Thanks, so I have a an f320 ls, is it ok to flash the d802 baseband? I would like more bands for the US and possibly LTE. Thanks
grandixximo said:
I had a problem with my korean version LG G2 (i messed up some system files and i was stuck at reboot), i had to reflash the original kdz system file, and then i had to hack the phone network, and doing this also fixed all the network connectivity problems i had previously, which i tough was hardware but apperently wasn't.
I had to make extended searches to restore my phone to a working state, so i wanted to create a small guide for anyone interested in completly resetting phone to original and change to international network, this might work with D802 or other models too, but i have no idea, so try at your own risks, i am sure it will work on all the korean versions of the LG G2
Before you start for safety make a complete back up of your system
but most important backup up your QCN and backup your modem.img modemst1.img and modemst2.img all three of them in a safe place, you might need them if you want to restore phone basebands to old state, and i highly reccomend you do.
Backup is a very important precaution, please don't make me responsible for lost stuff, your internal SD will be completly erased, so backup everything you need, this will wipe clean everything on your phone.
If you are interested in where to get kdz files
http://csmg.lgmobile.com:9002/csmg/b2c/client/auth_model_check2.jsp?esn=
and write your phone IMEI after the = (found in settings or on the serial number of phone, under battery, korean version has battery removable)
Write down your imei because you are gonna need it again
Then to flash the kdz you can find tutorials on XDA
You should be on 4.4.2 when you are done (unless there is a 4.5 lollipop OTA in the future, finger crossed)
anyway after flashing frimware, the phone will only recognize branded SIM cards of the korean networks depending on what version you installed.
So if you want your phone to be international, and with all the sensors working and so on, you have to root the rom, install a recovery with autorec from cloudyfa
enter recovery and flash this http://pan.baidu.com/s/1jIe5o pass: us56
this is a link i found on a chinese forum, i downloaded the F320LSK_EDGE_V3.zip
after reboot give sometime for the mobile to find network, it will need 5minutes the first time, it did for me, after everything working perfectly
the only thing is your imei will be reset to 0
to fix this
http://www.droidviews.com/how-to-backup-and-restore-lost-imei-on-lg-g2/
the second part of this guide
I think this will help a lot of people with network problems, or those who have bricked and wasnt to restore the phone to a working state.
also after you are done you can install any rom you'd like, i'm on cloudyG3 and everything is flawless, just don't flash the baseband like reccomended, the proper baseband is the one i linked
I have no problems with wifi to 3G switching, i have no problem with 3G whatsover, there should be no problem also with 4G but i can't confirm that, haven't tried GPS extensivly yet, but it seems to be fine.
For what i can understand these files that you need to flash are the basebands of the 802 international model, so in theory this should fix problems for other models too, but i haven't tested, so do at your own risk
Click to expand...
Click to collapse

jedisurfer said:
Thanks, so I have a an f320 ls, is it ok to flash the d802 baseband? I would like more bands for the US and possibly LTE. Thanks
Click to expand...
Click to collapse
Not really the baseband i linked is based on the D802 but is heavily modified to have it work on all F320 models, also if you flash this baseband it will erase your IMEI, and you if you flash other basebands that other devs post here on XDA they won't work.
It's working very good for me i have no complain, wifi 3G 4G and calls even roaming

grandixximo said:
Not really the baseband i linked is based on the D802 but is heavily modified to have it work on all F320 models, also if you flash this baseband it will erase your IMEI, and you if you flash other basebands that other devs post here on XDA they won't work.
It's working very good for me i have no complain, wifi 3G 4G and calls even roaming
Click to expand...
Click to collapse
Thanks for answering

grandixximo said:
Not really the baseband i linked is based on the D802 but is heavily modified to have it work on all F320 models, also if you flash this baseband it will erase your IMEI, and you if you flash other basebands that other devs post here on XDA they won't work.
It's working very good for me i have no complain, wifi 3G 4G and calls even roaming
Click to expand...
Click to collapse
Thank you for your information

Of all the stuff I googled, this is by far the page/site that provided the best and most helpful information. I will start the story by stating I am jealous of a friend of mine that has the LG G3. Seeing his Android Operating System made me drool. I wanted it. I rooted my phone and flashed the OptimusG3 v1.4.1 rom without making a backup of anything on my phone; no EFS backup, no IMEI backup, no modem/baseband backup, nothing. My previous experience rooting and flashing my HTC EVO gave me a false confidence in rooting the LG G2. When OptimusG3 booted I somehow lost the network, APNs, baseband; thus I couldn't make any phone calls, send text messages, or send or receive any internet data. My first reaction was to revert back to the stock firmware. I could not find a kdz file that matched my phone and would work; an LG G2 F320L on the LG U+ network in South Korea. I tried multiple versions of the LG Flash Tool to try and flash the stock firmware back on the phone. I eventually found a tot file that worked, but I ended up losing my IMEI in the process. I tried taking the phone to get repaired by LG techs and they couldn't figure out how to fix it. They wanted 281,000W, about $281, to fix the motherboard. I tried getting a replacement phone and the LG employees tried to get me to renew my contract and purchase a new phone and SIM card, around $480 for that route. I ended up buying an older LG F160L and placing my SIM card in that while I attempted to repair my phone.
On to the good stuff, the tot file got me to a working version of 4.4.2 Android but it was not stable and constantly rebooted, showed up with errors, no wifi, no keyboard. I found 4 different kdz files that were various versions of 4.2.2 and 4.4.2. It took me awhile to find a way to flash the kdz file properly. I used LG Flash Tool 2014 Build 03/07/2014. I had to change the Type to CDMA and Phone Mode to CS_EMERGENCY before doing a CSE Flash. With those settings I had 4.4.2 on the phone running F320L21V. I rooted the phone, flashed F320L_EDGE-4_42_V2 *AND* KK_Baseband_F320L, before using the above fix to restore the IMEI on the phone. As of right now the phone is on F320L21V, I can make and receive calls, send text messages, the wifi hotspot works, and I can send and receive internet data. However, there are still a few issues: knock-on doesn't work and in the notification bar it states there is a software update is available. Every time I install the update the phone boots into TWRP. I have to hit Advanced, Terminal Command, Select and enter in the following two commands in the shell to get it to boot:
dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/fota
dd if=/dev/zero of=/dev/block/platform/msm_sdcc.1/by-name/misc
I have since made an EFS backup, backed up the modems, and made a TWRP backup. Is it safe for me to flash another rom? Should I try using the LGMobile Support Tool to restore the firmware to F320L21y, to which I'm sure there isn't a root method for?

grandixximo said:
I had a problem with my korean version LG G2 (i messed up some system files and i was stuck at reboot)
Click to expand...
Click to collapse
Is this working with latest 30D Firmware Lollipop 5.0.1?
I was working great on Kitkat firmware but seems to be not working good on Latest 5.0.1.
If you have any new Mod like this for lollipop please share.

Hello, to both of you,
@AlphaQ99
You can safely flash clodyG3 and have a phone almost identical to the g3, that is the ROM I'm using, it's stable and looks fantastic, and I have decent battery also with original kernel.
It should remove the update requests and the other problems you are having, just don't flash the basebands that come separated from the ROM, keep the basebands posted in the OP, or reflash it if something doesn't work.
@Shivam Bhalla
You can try the edge v3 zip from the cloud baidu drive I posted in the OP?
Let me know if it works, I guess if it does let me know, because I want to flash the new update too, if not let me know too so I won't flash it...
If it doesn't work just download a 4.4 or 4.2 kdz and then flash the modified basebands and whatever ROM you'd like over that, I reccomend cloudyG3 if you want a G3 look.
And restore your imei with the OP instructions.
If the v3 doesnt work when there will be a lollipop version it will be posted in that drive in the OP.
I think we'd better wait still for updating to lollipop kdz or roms, I myself will attempt the update just after the clodyg3 ROM will be updated, and that will take sometimes, since they are waiting for a D803 official update...
Best of luck to both of you

I tried to flash CloudyG3, Optimus G, and CloudyFlex 2.7 all for the F320L. All of them did not work properly. I had data, I couldn't make phone calls or send text messages. I think the APN settings were incorrect and I tried changing the settings to match LG U+ and tried to change the build.prop file. They all made the com.android.phone cause a force close. To fix the knock on/off I had to go to the dialer, hit 3845#*320# > HW Device Test > Touch Test > Touch Firmware Upgrade.
I ended up going back to stock using the kdz file in this post and I'm having fun with lollipop: http://forum.xda-developers.com/showpost.php?p=58206425&postcount=1

You flashed lollipop and everything is working fine?
You are using my basebands?
Or was it unlocked already?

I simply flashed the stock kdz file and everything is working fine. I lost root which at this point I am fine with.
Sent from my LG-F320L using XDA Free mobile app

I see but you are using a U+ Sim?
Like the one ur phone is locked with?

Yes, I am using a U+ SIM card.
Sent from my LG-F320L using XDA Free mobile app

Then everything should have worked with the other kdz too, the problem is I'm not using a U+ Sim so I need to unlock the network, for that I probably need root, and a recovery, so I'll wait, unless the other guy can figure it out...
I'm happy everything turned out OK for you, how is lollipop? Worth the update?

I like lollipop. It's something fresh and new. I was really tired of the old keyboard and the UI was getting stale. I just wanted something new and different. Lollipop has been working flawlessly and had it come out two weeks ago I would probably wouldn't have bothered with rooting the phone to begin with. For some people it wouldn't be worth updating because I'm pretty sure there isn't a root method for it yet. For someone who doesn't care much about rooting the phone it would be worth it. When I get tired of lollipop I'm sure I'll be back on here looking for root options.

grandixximo said:
Then everything should have worked with the other kdz too, the problem is I'm not using a U+ Sim so I need to unlock the network, for that I probably need root, and a recovery, so I'll wait, unless the other guy can figure it out...
I'm happy everything turned out OK for you, how is lollipop? Worth the update?
Click to expand...
Click to collapse
I tried flashing it on lollipop but networks doesnt seems to be stable sometime whole day i dont have any problem sometime they never come.I am also not using U+ sim thats why I also need that hack to work on my phone. Now am again back to cloudy g3 rom and waiting for any updates regarding newbasebands for lollipop too.

grandixximo said:
Then everything should have worked with the other kdz too
Click to expand...
Click to collapse
@grandixximo
Are you still on Kitkat or using Lollipop???
These basebands are not working on lollipop and because of which I couldnt able to have taste of stock lollipop roms.
Networks works good in 30E latest firmware but not a single sensor is working after flashing this basebands on latest firmware.
If you got any solution for new basebands do share with us.

No lollipop baseband that i know of sorry....
I look at the chinese forums from time to time, and they seem to have figure out something, but i cannot understand very clearly, since i use google translate....
If someone who reads chinese can have a look.
http://bbs.gfan.com/forum-1345-1.html
this is the forum

Seems we'll be waiting for it

Hey guys !!! I fixed the network on Android 5.0 (f320l)
I am from Kazakhstan, and do not speak English use a translator .... so sorry.
1) First you need to install stock rom (I used f320l21y_00.kdz) (LG Flash Tool 2014)
2) Install Root (I used Stump-v1.2.0.apk)
3) Install Recovery (I used F320L_AutoRec.apk)
4) Then you need extract TWRP.rar to Internal Storage
5) Reboot to TWRP and tap to "Restore" => 2014-12-06--02-11-08 KOT49I => swipe to restore => Reboot (decided sim card)
6) Restore IMEI (post 1)
7) Then i install CloudyG2_3.0 (5.0) and I have all worked on Android 5.0
TWRP.rar can use for f320l and f320k (f320s not sure, but you can try)
Good luck!
Sorry for my English ....

4G networks undetected after IMEI recovery/custom ROM flash (HM2014819)

Hi
Last june I finally got my new Redmi 2 Pro (HM2014819, ergo the Brazilian version) and as soon as it arrived, I decided to reflash it into the latest available Nexus Experience custom ROM. Before that, though, I managed to check that my phone did had access even to LTE networks.
Turns out the GPS got weird because I supposedly didn't attempt to fix it before in the original ROM. I tried the the modemst1/2 format trick and it also didn't work. So I flashed MIUI7 over it again in an attempt to get a fix in the original ROM.
When I got back to MIUI, all celular/signal data was gone, along with my IMEI number (probably from the modemst partition wipe). I had to struggle a lot and I finally was able to recover it using this tutorial. However, as I just noticed recently playing Pokemon Go, 4G networks never came back even though I'm up and running on both H and H+ networks.
Using QPST and QXDM, I delve further into the QCN file and I could notice that the LTE values were actually set for Redmi2 PRIME version, which are Asia-related basebands 3 and 40 (meaning the actual LTE value in binary had 1's in the 3th and 40th bytes). However, the Redmi2 PRO version supports South America-related LTE bands 2, 4 and 7, as GSMArena points out.
Using this information and following this guide, I also tried to change/write over new Decimal values that would match my required LTE bands, but to no avail. When manually selecting networks, only 3G networks show up, even though I'm sure I could see and even pick 4G networks manually when I first booted up my (at that time, unmodified) new Redmi2.
What did just happen? What CAN I do?! How can I recover the intended, factory original version of the brazilian Redmi 2 networks?! Is there something to do with modemst2 erasure, or IMEI loss, or even NON-HLOS.bin file? Aren't they all overwritten when you reflash MIUI through MiFlash anyway?
Please, PLEASE, help me! I'm already on the brink of purchasing another cellphone (and it won't be another Xiaomi, that's for sure) if I can't get this to work. I did purchase this sorely because of the 4G connection and now I lost it entirely. Come on! :crying:

damn.... i've done this mess of erasing modemst's too and got the same problem. VERY LUCKY of me, i had a twrp backup that i did some days before doing this. hope you find some solution to this and dont give up on xiaomi just for a mess that you did xD

igorinolw said:
damn.... i've done this mess of erasing modemst's too and got the same problem. VERY LUCKY of me, i had a twrp backup that i did some days before doing this. hope you find some solution to this and dont give up on xiaomi just for a mess that you did xD
Click to expand...
Click to collapse
Igor, do you think you could at least share your modemst partition and/or your QCN file? I could use this to find the differences between my modem configurations and set it exactly as the brazilian's factory default modem.
If you're worried about IMEI scamming, then a simple printscreen from certain screens on QPST/QXDM will suffice, since I can tell what's wrong from them. If you're willing to help me (and have a rooted device), please, do tell and I can walk you through how to get them. Thanks!

http://en.miui.com/thread-218200-1-1.html
Follow this tutorial.
My signal came back but I'm having frequent signal loss. The only solution is to turn on/off airplaine mode.
I've to send it to tecnical assistant but I don't want to stay without the phone.
Acttually I'm not sure if the 4g works, because my city only supports 3G. When the data connection is on I don't loss the signal.

LuizHPiccinini said:
Follow this tutorial.
Click to expand...
Click to collapse
That's the exact tutorial I've followed to recover my IMEI. And I even mentioned that in the OP, bud. My problem happened after that. Please read more carefully.

Sorry, I just saw the second link.

Drezus said:
Igor, do you think you could at least share your modemst partition and/or your QCN file? I could use this to find the differences between my modem configurations and set it exactly as the brazilian's factory default modem.
If you're worried about IMEI scamming, then a simple printscreen from certain screens on QPST/QXDM will suffice, since I can tell what's wrong from them. If you're willing to help me (and have a rooted device), please, do tell and I can walk you through how to get them. Thanks!
Click to expand...
Click to collapse
as soon i get to my pc with the programs, ill try to help you if nobody comes first :highfive:

igorinolw said:
as soon i get to my pc with the programs, ill try to help you if nobody comes first :highfive:
Click to expand...
Click to collapse
Thanks a lot!

Oh gosh guys, I hope you can help me too! I've got the exact same problem with my HM2014819!

Did you manage to fix that?
Hi the exact same thing happened to me, I had no mobile internet at all and I fixed that qcn stuff but all I could find was asian versions, I get no 4G network and I have no other brazilian file to compare. If you managed to fix that, please please share, thanks a lot.

Phone Radio NOT working/turned on with converted Axon A2017 to Axon A2017U

Hello, first of all I want to let you know that I am not an expert but have so far been able to convert my Axon A2017 to the US A2017U version.
Big thanks [email protected] for supplying the necessary files.
I have:
-unlocked the bootloader
-rooted the phone
-flashed successfully B20
However, When I upgraded to B29, I lost TWRP and the cell radio of the phone is non-responsive. It won't even turn on. Bootloader is sill unlocked. I made phone calls on my T-mobile network when it was the origional A2017 B8 version. So I believe the bandwidths are compatible.
I have already done the following troubleshooting: (note: WIFI currently works just fine)
-My network is with T-Mobile, and I have been using a different axon A2017U for over a year with no problems.
-When I type *#*#4636#*#* and got to phone Info says, GSM Service: Radio Off, and the Turn on Radio button does nothing.
- I have tried working with every setting in this menu with no luck.
-When I insert my SIM card that is working on my current axon 7 into the converted A2017U, it is able to pick up T-Mobile network u.s. LTE, (fast.tmobile.com) and T-Mobile US (tmus). However, there are no bars because the radio is not turned on.
-When I try to search for new networks an error message saying, "network search cannot proceed when the data service is enabled disabled it?" So I disable it and nothing happens except for an error message saying "error while searching for Networks".
-In network mode I have switched to every option available, LTE/wcdma/GSM, wcdma/GSM, and GSM only with no result.
I am currently running Android version 6.0.1 on build B-29. Any help to get the radio up and running to receive phone calls would be greatly appreciated. Everything else is working except for the phone radio to send and receive phone calls.
Thanks for any Help.

Do you still have your IMEI or did the partition get corrupted?

ultramag69 said:
Do you still have your IMEI or did the partition get corrupted?
Click to expand...
Click to collapse
I check the number with several online checks, as well as T-Mobile, and they are unable to bring up any information about the number. I imagine it got blocked or corrupted during the upgrades.
What do I do to unblock it or make it functional again?

Go to settings>About>Status and check your IMEI number. If it's blank its noyt gonna work on any network...
You might be able to restore it if you have a backup of it - no-one will give you their backup as you then have their phone - or as a last resort, you might need to restore to the stock Chinese Rom again and see if that fixes it...
Good luck, I'm off to bed after a long backshift...

ultramag69 said:
Go to settings>About>Status and check your IMEI number. If it's blank its noyt gonna work on any network...
You might be able to restore it if you have a backup of it - no-one will give you their backup as you then have their phone - or as a last resort, you might need to restore to the stock Chinese Rom again and see if that fixes it...
Good luck, I'm off to bed after a long backshift...
Click to expand...
Click to collapse
Thankfully the numbers are there on both IMEI slot 1 and IMEI Slot 2. Thanks for your help. I hope to hear from you after a good night of rest.

Flash the correct modem/bootstack for your device.

Shipcaptian said:
Thankfully the numbers are there on both IMEI slot 1 and IMEI Slot 2. Thanks for your help. I hope to hear from you after a good night of rest.
Click to expand...
Click to collapse
Just go to the LineageOS thread and download the A2017 modem file, then just flash it

Choose an username... said:
Just go to the LineageOS thread and download the A2017 modem file, then just flash it
Click to expand...
Click to collapse
Sounds Good
Will I need TWRP to flash it or can is just use the Reg. recovery system?

Shipcaptian said:
Sounds Good
Will I need TWRP to flash it or can is just use the Reg. recovery system?
Click to expand...
Click to collapse
You need TWRP. Just install it with axon7tool via edl if you don't have fastboot, or try axon7toolkit

Choose an username... said:
You need TWRP. Just install it with axon7tool via edl if you don't have fastboot, or try axon7toolkit
Click to expand...
Click to collapse
Here's the latest update:
I loaded TWRP onto the phone and installed the file A2017U_N_Modem.zip. (Several Times)
nothing has changed. The radio is still turned off and no signal is being picked up from my carrier T-Mobile.
While loading it says: Loading A2017U_N_Modem for nougat system. I am not running nougat and I cannot find any other modem to download. Will that make a difference?
Any other suggestions are welcome?

Shipcaptian said:
Here's the latest update:
I loaded TWRP onto the phone and installed the file A2017U_N_Modem.zip. (Several Times)
nothing has changed. The radio is still turned off and no signal is being picked up from my carrier T-Mobile.
While loading it says: Loading A2017U_N_Modem for nougat system. I am not running nougat and I cannot find any other modem to download. Will that make a difference?
Any other suggestions are welcome?
Click to expand...
Click to collapse
You need to flash the A2017 modem, not the A2017U one
Here: https://www.androidfilehost.com/?fid=457095661767137840

bkores said:
You need to flash the A2017 modem, not the A2017U one
Here: https://www.androidfilehost.com/?fid=457095661767137840
Click to expand...
Click to collapse
Okay it works! I've got signal but when I try to make a phone call and my other phone picks up I can't hear or say anything. Any idea what's happening? I have tried refreshing the signal with no luck.

Hey man, I'm having the same problem with my Axon 7, brand new A2017U. Turned it on for the first time and I haven't had an ounce of radio on. Same things you've tried I've tried and it refuses to work. Mine is not rooted and I don't want to. I've tried downgrading my update and to no avail. Factory reset etc. I've contacted ZTE and they said they have forwarded my details and my phone details, storage size, color etc. To the necessary representatives. I think I'm gonna be sent a replacement, but just wanted to let you know your not alone.

Le Pro 3 "No SIM Card" bug

I've had a few mobile data related issues on a few different ROMs now, and am looking for any solutions. The first problem I've been having recently is where my phone randomly reports that there is no SIM card inserted and won't make or receive calls and cellular data doesn't work. Simply rebooting or removing and re-inserting the SIM will instantly fix the issue but I'd prefer to find a solution so I don't have to reboot my phone all the time. Another new issue I've noticed is where the signal strength remains constant but the "ASU" goes from 40 or so to 99 and my bars appear to drop to nothing, this issue may have only started after my most recent install of lineage. I have the US variant of the phone and currently have Lineage OS 14.1 but even when previously on an unmodified copy of EUI 21s, albeit after installed after a few other ROMs, I was getting this issue. Does anyone have any ideas why I might be having these issues, or any ideas on what to try to fix them? Any insight is appreciated!

in my case I have the x722 and this does not recognize any SIM at any time

Did you try factory resetting? Are your APN settings for your carrier correct? It could be a lot of things. If you bought it in the U.S. from a U.S. store, you'll probably be able to RMA it (easier than the rest of us, at least). If the issue persists, I'd say open a case and ask for a replacement because it's your best option.
When did these issues start? From the beginning? If not, did you flash the modem correctly?

sk8223 said:
Did you try factory resetting? Are your APN settings for your carrier correct? It could be a lot of things. If you bought it in the U.S. from a U.S. store, you'll probably be able to RMA it (easier than the rest of us, at least). If the issue persists, I'd say open a case and ask for a replacement because it's your best option.
When did these issues start? From the beginning? If not, did you flash the modem correctly?
Click to expand...
Click to collapse
I don't remember exactly when I started having these problems to be completely honest, I just know that on EUI, after once flashing to lineage then back to EUI, I was having issues with it saying NO SIM INSERTED and now after flashing to Lineage and re flashing the 19s modem I am still having issues. I suppose I can try to RMA since I bought it at launch on LeEco's US store. Though I may have passed a year of ownership so I may be out of warranty . I don't really know what else to try, maybe this?

My understanding of this phone is, flashing stock rom (either US version or CN version), whose size is about 1.4g bytes, can give you the modem.
All the roms developed here do not have modem images.

I have faced the same issue trying installing custom ROM while sim card inserted.
The solution for me is to remove the sim try completely
Fastboot this (chinese stock) rom : https://drive.google.com/uc?id=0By_Lx-WrwGa7cnZMZWF4QUdmQm8&export=download
complete the installation normally using your wifi and then insert sim tray with sim. Hurray ! I got that working.
With this chinese stock rom I got everything what I wanted google play store, assistant and etc. (except android > 6)

mhamzas said:
I have faced the same issue trying installing custom ROM while sim card inserted.
The solution for me is to remove the sim try completely
Fastboot this (chinese stock) rom : https://drive.google.com/uc?id=0By_Lx-WrwGa7cnZMZWF4QUdmQm8&export=download
complete the installation normally using your wifi and then insert sim tray with sim. Hurray ! I got that working.
With this chinese stock rom I got everything what I wanted google play store, assistant and etc. (except android > 6)
Click to expand...
Click to collapse
First thing don't flash this ROM is not a good idea bad advice.
Try flashing 727 19s modern backup all on computer and do a hard reset.
Let know if this helps?
Sent from my LEX727 using xda premium

mchlbenner said:
First thing don't flash this ROM is not a good idea bad advice.
Try flashing 727 19s modern backup all on computer and do a hard reset.
Let know if this helps?
Sent from my LEX727 using xda premium
Click to expand...
Click to collapse
Haven't tried 727 19s modem backup, but what works for me is this ROM.
I know this ROM is in chinese and you might struggle on changing the stuff but when I faced the issue, the only thing I needed is to make the device usable whatever it'll cost.
It'll be great if modem backup thing will work for anybody. This ROM might be the last option for you.

mhamzas said:
Haven't tried 727 19s modem backup, but what works for me is this ROM.
I know this ROM is in chinese and you might struggle on changing the stuff but when I faced the issue, the only thing I needed is to make the device usable whatever it'll cost.
It'll be great if modem backup thing will work for anybody. This ROM might be the last option for you.
Click to expand...
Click to collapse
If you flashing that ROM with their firmware if you have a big problem you can't fix it you are bricked 727 pro users should flash that firmware ect!
Their averaging one brick a day flash your own firmware stay safe.
Sent from my LEX727 using xda premium

No signal on stock ROM and only 3g on custom Oreo roms

I decided to flash stock ROM again after having some camera issues on all Oreo ROMs. I have done this process many times and my PC is all set up to do a stock flash. This time after flashing stock rom for my UK g5 plus, I booted to no signal. After repeating the stock ROM flash a few times and, trying a few APN options and switching to 3g and back to 4g with nothing working, I realized there is a problem. After this, I tried going back to 8.1 pixel and Nitrogen, which did return my signal but, no 4g only 3g.
I'm a little confused as to what is going on here, no custom ROM flash can leave any effect after fastbooting stock to my knowledge. Any ideas?

How to
Credits @Castell93
Step by step:
1. Flash TWRP.
2. Flash Pixel Experience rom if we haven't flashed yet.
3. Turn on phone with flashed rom to obtain network signal
4. Here we will get the IMEI and only have 3g signal, so we need to restart the phone in bootloader mode and type in fastboot "fastboot erase modemst1" and "fastboot erase modemst2", these two command will give us IMEI and 4g signal.*
5. Turn on Pixel Experience again to obtain 4g(verify it pls), shutdown and enter Recovery mode (TWRP).
6. Do a backup of EFS and install stock rom.
7. Restore EFS backup and enjoy.
* NOTE: It's very important to turn on the phone once flashed Pixel Experience to obtain IMEI info and turn on again to obtain 4G.

This works to get 4g but volte no longer is working (used to be fine on nougat). I'm using TMobile usa

maqsur said:
This works to get 4g but volte no longer is working (used to be fine on nougat). I'm using TMobile usa
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Click to collapse
So, are you able to get back the 4G mobile data (4G LTE) at least?

Yes, I get LTE again, but not volte. Sad

Currently, all Oreo roms are causing this issue because they seem to update IMEI info and the modems. Once an Oreo rom has been flashed, there is no way to get voLTE back at the moment, however 4G can work again (with the method above).This issue will probably not be solved until the official Oreo rom is released by Motorola.
Here is the link for a forum about this https://forum.xda-developers.com/g5-plus/help/restore-imei-0-moto-g5-xt1687-t3739808.

Hello, I know this thread is old. But I have a moto g5 xt1670 and it's been a week since I have lost 3g and 2g in my phone. I only have 4g. So I can't make nor receive calls. It is on stock Oreo 8.1. Going back to 7.0 stock didn't help. Neither Going to custom rom 9.0. don't know what else to do.

ajmdve said:
Hello, I know this thread is old. But I have a moto g5 xt1670 and it's been a week since I have lost 3g and 2g in my phone. I only have 4g. So I can't make nor receive calls. It is on stock Oreo 8.1. Going back to 7.0 stock didn't help. Neither Going to custom rom 9.0. don't know what else to do.
Click to expand...
Click to collapse
Trying using the QCOM option in the fastboot menu. Have been stuck on 3g since late 2017 and finally got it back by selecting that option which reboots me into the OS with working 4g regardless of what rom I flash. Don't know if it will work for you but try it and let me know.