Develop Bugs

[Q] lg p936 android 2.3.6 tele2 reboot

My phone is rebooting when I use the internet operator (tim) or wi-fi, it happens two or three times after each battery charge normally. Did you guys can guide me? I live in Brazil and bought the unit overseas and got interested in it have 4g lte network, hd screen. I tried to update the LG support Portugal but continued with the same problems, to access the internet or youtube or GPS (google maps) that is most often occurs when rebooting. Is it hardware problem, or is the firmware. I even saw some upgraded their lg optimus lte 93x for official ics rom, but were having problems similar to mine, but have not seen anyone with such a problem reporting system gingerbread. Please help me, this unit is not for sale in Brazil.

Are you completely stock for example no root no custom recovery like cwm or twrp? If you are it could point to a hardware problem. The latest gingerbread p936 ROM is the v10i released in January this year. It is available as a kdz file on the internet (just Google it). Use the kdz installer available under general on xda. Try installing it to see if your problems go away. Good luck.
Sent from my LG-P930 using xda app-developers app

Thanks for the help Swetnes, v10i kdz installed and my phone is working fine :good:.
I have a question and I am noob, if you can help me again. The thing is, I was wanting to put the official rom v20c lg P936 for it to work with ics now the problem is, if you later want to change it again to gingerbread, ics if not work well, I can do using official v10i kdz, using the same tools I used for this update, is back from ics for gingerbread only flashing kdz files?

p.batis said:
Thanks for the help Swetnes, v10i kdz installed and my phone is working fine :good:.
I have a question and I am noob, if you can help me again. The thing is, I was wanting to put the official rom v20c lg P936 for it to work with ics now the problem is, if you later want to change it again to gingerbread, ics if not work well, I can do using official v10i kdz, using the same tools I used for this update, is back from ics for gingerbread only flashing kdz files?
Click to expand...
Click to collapse
You can install any kdz file with that installer you used to flash v10i. If you want to install cwm so you can install many custom ROMs go here: http://forum.xda-developers.com/showthread.php?t=2044645
I hope this helps. Also make sure you are using the same kdz installer instead of the one in the guide if you have win 7/8.
Sent from my LG-P930 using xda app-developers app

P936 continues with random restart problems
Good morning, gentlemen.
My phone after install v10d kdz files, v10i, v20c (O2D and vodafone) continued to have random reboots, even worse when installed ics (v20c kdz) as well as random restart, still had to take the battery out and replace the handset to reconnect . Installed AnTuTu benchmark and checked on the issue of ram that my unit marked 768 mb of ram. I saw in the specs that the device actually has 1gb of ram in lg site. Is this is the cause of reboots? Took for technical assistance in Paraguay (where I bought the phone) has no technical assistance from lg and sale of the device in Brazil, I'm worried because technicians end up not take us too seriously. I explained to them that when used with frequency or internet connected the gps for some time and they will evaluate whether problem really. You have to post photo or check the device you in AnTuTu benchmark or other benchmark to see if my question makes sense?
thanks.

Which is my phone? E980, E988 or F240L

I have done stupid things in my life, but this may top them.
I purchased an used AT&T Optimus G Pro (E980) few days ago. I bought it unlocked and was using it on T-Mobile network without any problem. I live around the area where I get LTE. AND I was getting LTE. I was successful in rooting it and was in the process of installing a custom recovery when I softbricked. No problem, right?
1. I first tried to use (TOT) found at http://forum.xda-developers.com/showthread.php?t=2420219 to get back to E980 stock. I could not get past 25% no matter what.
2. I then used (KDZ) to install F240L firmware. Dumb. I know, but at the time I did not know better.
3. I then used (KDZ) again to install E988. I had signal but only 2G speed.
4. I then used (TOT) to flash E980 stock. Great, but no signal. I tried various stuffs to get the signal working. I flashed all AT&T modems found. I tried installing different custom ROMs. I tried using dial pad method. I tried modifying bulidprop, but nothing is working.
5. I have also tried flashing Taiwan KDZ, Hong Kong KDZ, Central America KDZ, Panama KDZ, and German KDZ. I also tried 3 different AT&T TOT files. I can get signal on Taiwan & Hong Kong KDZ, but no signals on others.
6. I have successfully rooted my phone using Towelroot. I have installed SuperSu, BusyBox, an GPRO Kitkat Recvery.
6. Also, when I tried to flash different recoveries, it fails. PhilZ Touch CWM fails, and my phone is being recognized as the LG F240L and does not let me install at all even though I fully flashed Taiwan KDZ file (E988). LG 240L KDZ file is the first one I flashed when the AT&T TOT failed to flash.
I have no idea what I can do to get my LTE back. If someone can give any advise to get my modem work right, I would appreciate it. I am game to flashing any fimwares or trying different roms or anything.
Thanks.
Any help or suggestion is really appreciated.

qcshin said:
I have done stupid things in my life, but this may top them.
I purchased an used AT&T Optimus G Pro (E980) few days ago. I bought it unlocked and was using it on T-Mobile network without any problem. I live around the area where I get LTE. AND I was getting LTE. I was successful in rooting it and was in the process of installing a custom recovery when I softbricked. No problem, right?
1. I first tried to use (TOT) found at http://forum.xda-developers.com/showthread.php?t=2420219 to get back to E980 stock. I could not get past 25% no matter what.
2. I then used (KDZ) to install F240L firmware. Dumb. I know, but at the time I did not know better.
3. I then used (KDZ) again to install E988. I had signal but only 2G speed.
4. I then used (TOT) to flash E980 stock. Great, but no signal. I tried various stuffs to get the signal working. I flashed all AT&T modems found. I tried installing different custom ROMs. I tried using dial pad method. I tried modifying bulidprop, but nothing is working.
5. I have also tried flashing Taiwan KDZ, Hong Kong KDZ, Central America KDZ, Panama KDZ, and German KDZ. I also tried 3 different AT&T TOT files. I can get signal on Taiwan & Hong Kong KDZ, but no signals on others.
6. I have successfully rooted my phone using Towelroot. I have installed SuperSu, BusyBox, an GPRO Kitkat Recvery.
6. Also, when I tried to flash different recoveries, it fails. PhilZ Touch CWM fails, and my phone is being recognized as the LG F240L and does not let me install at all even though I fully flashed Taiwan KDZ file (E988). LG 240L KDZ file is the first one I flashed when the AT&T TOT failed to flash.
I have no idea what I can do to get my LTE back. If someone can give any advise to get my modem work right, I would appreciate it. I am game to flashing any fimwares or trying different roms or anything.
Thanks.
Any help or suggestion is really appreciated.
Click to expand...
Click to collapse
Hello, I hope you already solved your problem by the time I'm writing this, but if you haven't, here is some extras to consider.
It could be funny to think about it, but it happens to everyone, we do everything we should, and we forget the basic stuff.
For basic stuff I'm referring to going into network preferences and setting up 4G/LTE as preferred network, you may also try to scan networks and see if a 4G/LTE network is on the list for your carrier, and obviously select it, if you don't see 4G networks then there could be an issue with your modem-rom combination, try something else.
Other thing is the APN, remember to set up the proper APN, maybe your phone had the proper setup when it came to you first but you wiped it all when you started flashing roms.
There are other advanced options that I haven't used to try to set 4G as preferred networks, but since I don't have 4G with my carrier I haven't had your problems to know they are, be sure to google them or search here on XDA.
Hope this helps bro!, let us know what works for you of if you still need ideas.

Still looking
Jose-MXL said:
Hello, I hope you already solved your problem by the time I'm writing this, but if you haven't, here is some extras to consider.
It could be funny to think about it, but it happens to everyone, we do everything we should, and we forget the basic stuff.
For basic stuff I'm referring to going into network preferences and setting up 4G/LTE as preferred network, you may also try to scan networks and see if a 4G/LTE network is on the list for your carrier, and obviously select it, if you don't see 4G networks then there could be an issue with your modem-rom combination, try something else.
Other thing is the APN, remember to set up the proper APN, maybe your phone had the proper setup when it came to you first but you wiped it all when you started flashing roms.
There are other advanced options that I haven't used to try to set 4G as preferred networks, but since I don't have 4G with my carrier I haven't had your problems to know they are, be sure to google them or search here on XDA.
Hope this helps bro!, let us know what works for you of if you still need ideas.
Click to expand...
Click to collapse
Thanks for your suggestion! I have an option to select GSM/WCDMA/LTE auto which has been selected. I have also manually entered the correct APN setting. I think I had messed up my phone when I flashed F240L firmware, but I am still looking for a way to get it start working properly again if possible.

Sorry i do not speak english, I use google translator
I think you need the E980 stock room
I think the following link can help you:
1. TOT, dll firmware E980:
lgviet.com/forum/threads/tong-hop-KDZ-firmware-tot-and-dll-for-F240-LSK-e988-e980.17058
2. Soft-Brick:
lgviet.com/forum/threads/huong-dan-soft-brick-Vuot-loi-kdz.14917
3. LG G PRO 4.4.2 - Root - Recovery - KDZ.
lgviet.com/forum/threads/moi-thu-ve-lg-g-pro-4-4-2-root-recovery-kdz.14841
lgviet.com/forum/threads/root-recovery-stock-4-4-2-kitkat-g-pro-f240l-s-k.15539

nguyentrung84 said:
Sorry i do not speak english, I use google translator
I think you need the E980 stock room
I think the following link can help you:
1. TOT, dll firmware E980:
lgviet.com/forum/threads/tong-hop-KDZ-firmware-tot-and-dll-for-F240-LSK-e988-e980.17058
2. Soft-Brick:
lgviet.com/forum/threads/huong-dan-soft-brick-Vuot-loi-kdz.14917
3. LG G PRO 4.4.2 - Root - Recovery - KDZ.
lgviet.com/forum/threads/moi-thu-ve-lg-g-pro-4-4-2-root-recovery-kdz.14841
lgviet.com/forum/threads/root-recovery-stock-4-4-2-kitkat-g-pro-f240l-s-k.15539
Click to expand...
Click to collapse
Thanks for your help. I had already tried them all. Nothing is working.

can u tell us which model is it by removing battery and reading the label?

LG F240-EUR upgrading issues

I have Lg F240-EUR version, which is running on 4.1.2.but the software/os that came with the phone is slightly different from the original firmware.And the signal is sometimes dropping like showing x mark for 3-5 times a day.and the main problem is it cant be updated to any version.I checked in the IMEI website and found that my model is f240s.If I upgrade thehpone,i will loose signal forever as some people mentioned that they lost signal after upgrading their phone through custom roms or official firmware in other forums.I want to upgrade my phone to either official 5.0 or any custom 5.0 rom. please help me in upgrading my phone so that i shouldn't loose the signal even after the update.

krishna13 said:
I have Lg F240-EUR version, which is running on 4.1.2.but the software/os that came with the phone is slightly different from the original firmware.And the signal is sometimes dropping like showing x mark for 3-5 times a day.and the main problem is it cant be updated to any version.I checked in the IMEI website and found that my model is f240s.If I upgrade thehpone,i will loose signal forever as some people mentioned that they lost signal after upgrading their phone through custom roms or official firmware in other forums.I want to upgrade my phone to either official 5.0 or any custom 5.0 rom. please help me in upgrading my phone so that i shouldn't loose the signal even after the update.
Click to expand...
Click to collapse
I bought a similar refurbished phone from Aliexpress and the system information is the same as yours. I think they just messed with the build.prop so the build information looks ready for Europe. I will advise you to install the kdz so you have the Stock ROM and firmware. That was what I did anyway. The only porblem is that you will get some Korean apps but the phone is stable anyway. And when flashing, use "CSC" not "Normal" flash.
By the way, my phone was lagging very much before I installed the Stock ROM.

lallolu said:
I bought a similar refurbished phone from Aliexpress and the system information is the same as yours. I think they just messed with the build.prop so the build information looks ready for Europe. I will advise you to install the kdz so you have the Stock ROM and firmware. That was what I did anyway. The only porblem is that you will get some Korean apps but the phone is stable anyway. And when flashing, use "CSC" not "Normal" flash.
By the way, my phone was lagging very much before I installed the Stock ROM.
Click to expand...
Click to collapse
So after upgrading ,is ur phn showing signal normal?many mentioned that after upgrading they lost their mobile signal and their imri number to all zeros.so are u sure this wont happen to me?i am frm india.so there will be no problem with the bandwidths for networks in india?
At present even my phone running on 4.1.2,whenever i enable my data,after disabling it my signal shows x mark for 2-4 seconds then i will get back again.also some cals cant connect to my phn.so after upgrading,are there any chances of loosing my phone signal?

krishna13 said:
So after upgrading ,is ur phn showing signal normal?many mentioned that after upgrading they lost their mobile signal and their imri number to all zeros.so are u sure this wont happen to me?i am frm india.so there will be no problem with the bandwidths for networks in india?
At present even my phone running on 4.1.2,whenever i enable my data,after disabling it my signal shows x mark for 2-4 seconds then i will get back again.also some cals cant connect to my phn.so after upgrading,are there any chances of loosing my phone signal?
Click to expand...
Click to collapse
I cannot reaqlly gurantee your phone being messed up but mine works perfectly after installing the kdz. I installed the 4.4.2 version although there is lollipop version as well. I just want to try the kitkat version for some time.

lallolu said:
I cannot reaqlly gurantee your phone being messed up but mine works perfectly after installing the kdz. I installed the 4.4.2 version although there is lollipop version as well. I just want to try the kitkat version for some time.
Click to expand...
Click to collapse
I am unable to install custom recovery on my f240s.can u pls help me with the steps and links inorder to take backup of my current version. Also one doubt.If anything goes wrong after upgrading to lollipop (like if i lost signal in my phone) then after restoring the backup rom,can i get the signal back?? Also which is better? Some complained that after upgrading to lollipop they got signal issues.is installing kitkat= installing lollipop or is there any difference considering to the signal prblm?
(sorry for my bad english but i need help.pls suggest me)

Can't connect to network after restoring LG G2 LS980 to stock

Hello,
I followed this guide to restore my sprint LG G2 to stock Kitkat 4.4.2. Everything went fine, the phone is working, the only problem I have is that I can't connect to any network. The phone is not recognizing any of the local network providers. I bought this phone on ebay and it came with a custom rooted rom installed on it, so I decided to "clean up the mess" and restored stock kitkat. As I mentioned before everything went fine, but the network is not working (it was working with the android version before i restored stock 4.4.2). Maybe its because I'm not living in the USA (I'm from Bosnia/Europe). Should I flash a different radio on it? The phone is updating atm with OTA and I'm pretty sure that the updates wont help. Did anyone else had these issues? Any help would be highly appreciated.
Update: My phone just got upgraded to Lollipop, but the network issue is still present
Update 2: I just reinstalled "cm-12.1-20151031-NIGHTLY-ls980" Lollipop 5.1.1. and it had no problems to find all the networks in my area, so this clearly has to do with stock LG android 4.4.2.

When you say you can't connect to network, are you referring to your mobile carrier network, or like WiFi?
If it's your mobile carrier that you can't connect to, you might need to switch your radio. Take a look at this guide and the section about using radio switcher: http://forum.xda-developers.com/sprint-g2/help/how-sprint-lg-g2-ls980-to-t-mobile-t3230685

Fuzz1303 said:
When you say you can't connect to network, are you referring to your mobile carrier network, or like WiFi?
If it's your mobile carrier that you can't connect to, you might need to switch your radio. Take a look at this guide and the section about using radio switcher: http://forum.xda-developers.com/sprint-g2/help/how-sprint-lg-g2-ls980-to-t-mobile-t3230685
Click to expand...
Click to collapse
Hey there. Sorry for the late response. I kinda gave up on making the stock LG ROM work, which is why I kept on using CM12.1 . What I was referring to was my mobile carrier. The phone has no problems connecting to any WiFi signal.
I didn't try to flash any radios at all after restoring the LG G2 stock ROM. Maybe I should have tried one of the radios from this CM12.1 for LG G2 tutorial. Here is a direct LINK to the full list of LG G2 radios, where I downloaded the radio for my phone. I'm not sure if the other LS980 Radios would work on my device. There are 4 different radios available for the LG G2 LS980.
Do you think flashing one of these radios would help solving this problem after restoring the LG stock ROM?

LG-G3 D851 - 4G stopped working on Android 7/8/9.

Dear all,
I got a strange situation and I've tried several options already, but I'm lost.
My LG G3 D851 (T-Mobile) is currently running on Lineoage OS 8.1 and my 4G is not working.
Even though I selected 4G preferred. Highest what I get is H+.
I've found a modem file, but that screwed up my 4G and 3G completely.
It doesnt matter which custom rom I select it will not allow me to work with 4G.
If I go back to the original Android 6 Rom I got 4G.
Who got an idea to get this fixed?

Is your IMEI still There ? Does your Phone Show Up at qpst? You did Not Read
anything i grüess so you probably havent Backes Up your efs? Ist there No Connection at all? Flashing Roms will Not fix your problem. But you should Go to Marshmallow Stock For now.
Custom Roms only Work with 21c and lower maybe you Just flashed The Wrong Modem. Google For The XDA LG G3 Modem thread

tritratrulala390 said:
Is your IMEI still There ? Does your Phone Show Up at qpst? You did Not Read
anything i grüess so you probably havent Backes Up your efs? Ist there No Connection at all? Flashing Roms will Not fix your problem. But you should Go to Marshmallow Stock For now.
Custom Roms only Work with 21c and lower maybe you Just flashed The Wrong Modem. Google For The XDA LG G3 Modem thread
Click to expand...
Click to collapse
My IMEI is still tere.
Dont know what you mean with QPST.
I've got backups and I can go back to any state, but I dont know what I should even consider check the EFS?
I'll check the Modem thread.
Maybe I can find a solution in there.

tritratrulala390 said:
Custom Roms only Work with 21c and lower maybe you Just flashed The Wrong Modem. Google For The XDA LG G3 Modem thread
Click to expand...
Click to collapse
The 21C thing is incorrect. Each variant of the G3 has their own set of modems. There is no 21C for the D851.
If memory serves we had 10 series (KitKat), 20 series (Lollipop), and 30 (Marshmallow). I'm currently using 30D modem from last time I had a factory stock installed. I get 4G/LTE on all of the installed ROMs (KK, LP, MM, N, O). Even when I was on 20G they were all good, though I didn't have Oreo at the time.
@Mr-Dutch, I have a small collection of D851 modems up on Mega. Since your last stock was Marshmallow I figure the ones to try, if you elect to do so, is 30D or 30E.
https://mega.nz/#F!WVRWmDII!oeZ17walw3sOi71mDkCKrw
LG G3 D851, Mahdi v2.9 ROM (4.4.4), microG (NoGApps), MultiROM, XDA Legacy

Yeah my Bad that was for The 855. And there IT says in The Post that IT only works Up to 21c but Not sure If thats still a Thing.
So have you tried flashing a Modem? And does IT Work now?