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[Solved][Q]Couldn't make call on 3G/H after updating baseband

OMG, after I tried SU660 baseband to solve wired loss of signal and nvFlash to 28G rom and baseband for my made in Korean "P990", it couldn't make any in/out coming call on 3G/H mode.
Say, the internet connection is all right. But whenever I call someone, the call would immediately cut off(CM10 showed network busy, stock 28G shows Call Ended). And any incoming call is the same, cut off directly (it won't go to Voice mail so I would lose the call without signal).
Everything's fine on 2G/EDGE mode.
Thus, I try to nvflash/smartflash back to CM10/Gingerbread to test if this is 28G rom problem but the problem still exist.
I have also tried diff. rom, baseband and RIL but same problem as above, 2G works, 3G fatal problem.
My original rom is cm10 with baseband 725.
SIM card seems no error as it works on other phone.
Could anyone have any ideas to solve this issue?:crying: I can't live without 3G. Thank you in advance.
Could anyone quote the baseband and ril used for cm10? so I could test it.
sorry for my English BTW.
Updated on 16 Nov 2012
[Problem Solved]
This issue should be about the IMEI or CAL data.
I had fixed it by erase CAL data with smartflash and reset IMEI with hyperterminal.

kencheung2008 said:
OMG, after I tried SU660 baseband to solve wired loss of signal and nvFlash to 28G rom and baseband for my made in Korean "P990", it couldn't make any in/out coming call on 3G/H mode.
Say, the internet connection is all right. But whenever I call someone, the call would immediately cut off(CM10 showed network busy, stock 28G shows Call Ended). And any incoming call is the same, cut off directly (it won't go to Voice mail so I would lose the call without signal).
Everything's fine on 2G/EDGE mode.
Thus, I try to nvflash/smartflash back to CM10/Gingerbread to test if this is 28G rom problem but the problem still exist.
I have also tried diff. rom, baseband and RIL but same problem as above, 2G works, 3G fatal problem.
My original rom is cm10 with baseband 725.
SIM card seems no error as it works on other phone.
Could anyone have any ideas to solve this issue?:crying: I can't live without 3G. Thank you in advance.
Could anyone quote the baseband and ril used for cm10? so I could test it.
sorry for my English BTW.
Click to expand...
Click to collapse
There is no original CM 10 ROM with BB 725. Go to this thread http://forum.xda-developers.com/showthread.php?t=1658047 by tonyp and go to the download section. Get the 2011-218-10b Baseband. Flash it accordingly. Install CM 7 or 9 via CWM and do not forget to format your system partition in CWM first. Can usually be found under 'Mount'. Oh, and wipe it too. After installation boot your phone and do not change the RIL. The right RIL is already in the ROM.
Test it and give feedback.

Raum1807 said:
There is no original CM 10 ROM with BB 725. Go to this thread http://forum.xda-developers.com/showthread.php?t=1658047 by tonyp and go to the download section. Get the 2011-218-10b Baseband. Flash it accordingly. Install CM 7 or 9 via CWM and do not forget to format your system partition in CWM first. Can usually be found under 'Mount'. Oh, and wipe it too. After installation boot your phone and do not change the RIL. The right RIL is already in the ROM.
Test it and give feedback.
Click to expand...
Click to collapse
Ty!
I'm now on baseband 1035.21_20110218
Rom: CM7 latest nightly/cm-7-20121021-NIGHTLY-p990.zip
But the problem still exists.
I did try [ROM] NVFlash Opti-3D v-1.4.4 V20s Stock GB Clean CWM | UNBRICK by Homero2 &
[TOOL] Full Brick Repair (Clean & Easy) by ProgMaq
both don't work. My phone is now half brick and full brick repair is of no use.
I'm now looking for stock bb and rom as my last effort.:crying: and omg again nexus 4 is from Lie's Good again if I had to buy a new phone. hate it a lot after P990.=(
Thank you again!

kencheung2008 said:
Ty!
I'm now on baseband 1035.21_20110218
Rom: CM7 latest nightly/cm-7-20121021-NIGHTLY-p990.zip
But the problem still exists.
I did try [ROM] NVFlash Opti-3D v-1.4.4 V20s Stock GB Clean CWM | UNBRICK by Homero2 &
[TOOL] Full Brick Repair (Clean & Easy) by ProgMaq
both don't work. My phone is now half brick and full brick repair is of no use.
I'm now looking for stock bb and rom as my last effort.:crying: and omg again nexus 4 is from Lie's Good again if I had to buy a new phone. hate it a lot after P990.=(
Thank you again!
Click to expand...
Click to collapse
Thought that my guide would help you. Hm. Last resort: then try to flash a kdz file. Gingerbread e.g.
Will wipe everything and includes BB and RIL. Also wipes your internal SD and recovery. Try it.
If it isn't working then it is maybe hardware related and a possible case for the LG warranty. So kdz flashing would be a good idea anyway.

Raum1807 said:
Thought that my guide would help you. Hm. Last resort: then try to flash a kdz file. Gingerbread e.g.
Will wipe everything and includes BB and RIL. Also wipes your internal SD and recovery. Try it.
If it isn't working then it is maybe hardware related and a possible case for the LG warranty. So kdz flashing would be a good idea anyway.
Click to expand...
Click to collapse
And finally i installed winXP for kdz and restore to v10f stock rom (kdz crash on win 8 and the installation takes me for over 2 hours). Under stock v10f & v20h, 3G is still not working. I thought this is SIM card or hardware issue now. Lucky me I bought this phone at the highest price and its life is less than 2 years. Time to bring it to repair.
Thank you again for your kind help. Closed topic:angel:

kencheung2008 said:
And finally i installed winXP for kdz and restore to v10f stock rom (kdz crash on win 8 and the installation takes me for over 2 hours). Under stock v10f & v20h, 3G is still not working. I thought this is SIM card or hardware issue now. Lucky me I bought this phone at the highest price and its life is less than 2 years. Time to bring it to repair.
Thank you again for your kind help. Closed topic:angel:
Click to expand...
Click to collapse
That are bad news. A lot of work for nothing.
Please try switching/changing the SIM card first. If it is really the culprit then your carrier shouldn't charge you for a new one. Maybe you can borrow one from a friend for testing your phone...
Sending it to LG is really the last resort.
Good luck!

Raum1807 said:
That are bad news. A lot of work for nothing.
Please try switching/changing the SIM card first. If it is really the culprit then your carrier shouldn't charge you for a new one. Maybe you can borrow one from a friend for testing your phone...
Sending it to LG is really the last resort.
Good luck!
Click to expand...
Click to collapse
Today I go to LG repair center for inspection. I find out that only my current carrier is not working. Say:-
Case one: my own Sims on my phone, don't work
Case two: my own Sims on other phone(same model P990), work (My Sims is fine)
Case three: other Sims with the same Carrier, don't work
Case four: other Sims with different Carrier, work
Thus, all Sims from my current carrier on my half brick P990 don't work. Other Sims from other carrier work.
The CS said the mainboard maybe broken after help restore officially and quotes HKD1600/USD200 for the repairing cost:cryingcost 2/3 nexus 4)
Just making a conclusion on it. Hope it could help someone with similar symptoms.
Maybe it's time to say goodbye to this forum and thank all contributed to my ex-phone.

No Sim Detected LG Optimus 2x :(

Hi
My phone suddenly stopped detecting all sim cards ( I have tried various working sims ).
It is running CM 7.2 and has been running cm 7.2 for a few months with no problems.
Today I took out the sim and put it back in to reboot, all was fine. I went to shower, came back and the sim suddenly stopped being detected.
I have tried to google but it seems most problems are to do with flashing a new rom and having the sim not work, my case is that the rom has been the same for a few months.
I have tried to flash different roms and I still have the same problem. I have a gut feeling it is the hardware that reads the sim that is faulty.
I have read something about a baseband, I dont know what that is but if it helps, when i go to the settings and click on 'about phone'
It says there is a baseband and it is version something. There are no question marks or anything like that.
I appreciate the help and would love some more troubleshooting suggestions.
The worst case scenario is unrooting it, flashing stock rom and send it back to warranty. I actually don't know how to do that so if anyone has a guide lying around please link me on that.

I have similar problem with new boot loader.
Download getril app from play store and see if your baseband is OK. If not, download and flash matching baseband from development thread. You will loose all personal data and your apps after flashing. Then download new ril with getril and reboot. Good luck...
This method was no helpful for me. Maybe you will have better luck.
Sent from my LG-P990 using xda app-developers app

asmerito said:
I have similar problem with new boot loader.
Download getril app from play store and see if your baseband is OK. If not, download and flash matching baseband from development thread. You will loose all personal data and your apps after flashing. Then download new ril with getril and reboot. Good luck...
This method was no helpful for me. Maybe you will have better luck.
Sent from my LG-P990 using xda app-developers app
Click to expand...
Click to collapse
Thanks for the reply,
When I first opened getril, it said RIL not found, I did not have one. I downloaded one and then it said RIL does not match. I then redid it on another firmware and it now says RIL and Baseband matches. Is this enough? The only weird thing is the baseband has canada and europe in it. I am from Australia. How do i tell which baseband/ril I need?

cimore000 said:
Thanks for the reply,
When I first opened getril, it said RIL not found, I did not have one. I downloaded one and then it said RIL does not match. I then redid it on another firmware and it now says RIL and Baseband matches. Is this enough? The only weird thing is the baseband has canada and europe in it. I am from Australia. How do i tell which baseband/ril I need?
Click to expand...
Click to collapse
First you flash BB, then download RIL with GetRil. Read completely through BB sticky topic in development section. All answers are there.
http://forum.xda-developers.com/showthread.php?t=1658047
[Baseband][P990] Complete Baseband overview thread
Sent from my LG-P990 using xda app-developers app

You can flash as much as you want, none of that will help. Had same issue once, flashed almost everything there was through SmartFlash, NVflash and all of that. This is what you need to do:
First, remove the battery from your phone. Write down the IMEI. Now boot up your phone, write *#06# and see if the IMEI that pops up is the same as the one you saw behind the battery. If not, let us know and I'll hand you the solution, but first check if the IMEI matches.

Custom40 said:
You can flash as much as you want, none of that will help. Had same issue once, flashed almost everything there was through SmartFlash, NVflash and all of that. This is what you need to do:
First, remove the battery from your phone. Write down the IMEI. Now boot up your phone, write *#06# and see if the IMEI that pops up is the same as the one you saw behind the battery. If not, let us know and I'll hand you the solution, but first check if the IMEI matches.
Click to expand...
Click to collapse
I checked the IMEI and it matches.
I have some extra information if it helps, when I choose a random RIL from getril, the battery might become a ? mark and the sim card not detected error doesnt show anymore, however when I put it back to the original RIL, my battery bar starts showing the 'power left' and also the sim not detecting error shows again.

Custom40 said:
You can flash as much as you want, none of that will help. Had same issue once, flashed almost everything there was through SmartFlash, NVflash and all of that. This is what you need to do:
First, remove the battery from your phone. Write down the IMEI. Now boot up your phone, write *#06# and see if the IMEI that pops up is the same as the one you saw behind the battery. If not, let us know and I'll hand you the solution, but first check if the IMEI matches.
Click to expand...
Click to collapse
I get the SIM Toolkit Incompatible Handset error and then whether I press OK or Cancel, shortly after I lose mobile network access. I've been trying all manner of different things, Smart Flashing, NVflashing, changing basebands, Rils, you name it.
I'm currently on the V30B root ROM http://forum.xda-developers.com/showthread.php?t=2064793 and the Ril matches the baseband from that ROM, but that hasn't helped either. So I went and check the in phone and behind battery IMEI and they are different! I'd love to hear what your solution to this is!

Custom40 said:
You can flash as much as you want, none of that will help. Had same issue once, flashed almost everything there was through SmartFlash, NVflash and all of that. This is what you need to do:
First, remove the battery from your phone. Write down the IMEI. Now boot up your phone, write *#06# and see if the IMEI that pops up is the same as the one you saw behind the battery. If not, let us know and I'll hand you the solution, but first check if the IMEI matches.
Click to expand...
Click to collapse
My problem was no service and IMEI unknown... Never managed to solve it. Reverted to old bootloader and problem solved.
Sent from my LG-P990 using xda app-developers app

IMEI Solution
If IMEI does NOT match, you will need to do this:
Check if you can get in a menu by typing 1809#*990#. If you can't, you will need to use a GB ROM (I remember I used Homero's GB NVFlash as I was on ICS bootloader and couldn't get access to it on ICS). Follow these steps if you are sure you can get into the menu:
1) Connect your phone by USB.
2) Enter 1809#*990# in dialer.
3) Select Port Setting -> Select CP USB
4) Install a program called Hyperterminal on your PC and open it. In COM settings select same port as in device manager -> LGE Mobile USB Seial Port (should be 115200)
5) Type at%imei and it should respond by saying OK
6) Now type at%imei and it should now display your current IMEI number.
7) Type at%imei=XXXXXXXXXXXXXXX where X is your original IMEI number.
8) Reset phone.
You might have to reboot your phone after step 3. But see if it works without.

I have been thinking that this is a hardware issue, I have not changed a single setting/rom/baseband at all, the sim just wasnt detecting when I came back to my phone. The rom and settings were the same for a number of months.
I am now going to give it in to warranty, however it only has 1 month left. I have tried to install the stock firmware but with no luck..
I found a rom to flash for my region, it is a zip file but when I try flash it with Clockworkmod, it says installation aborted....
Shouldnt I be able to flash the roms with CWM? The file is a zip file just like the CM7.2 rom I flashed. Do I need nvflash instead? I found the rom here :
http://forum.xda-developers.com/showthread.php?t=1852112 (the download links were removed so I googled the exact same rom)
I was also told that if I just use the LG update tool, it sohuld automatically update the phone to stock firmware AND unroot it, only that the update tool gives me an error. Whats the best approach guys?? I need to get this fixed before my warranty goes.

Custom40 said:
If IMEI does NOT match, you will need to do this:
Check if you can get in a menu by typing 1809#*990#. If you can't, you will need to use a GB ROM (I remember I used Homero's GB NVFlash as I was on ICS bootloader and couldn't get access to it on ICS). Follow these steps if you are sure you can get into the menu...
Click to expand...
Click to collapse
Bother. The 1890 etc didn't work on the p990 in android 4.0.4 (nor on my Nexus 4 incidentally), so I guess I'll have to flash down to GB. I'll let you know if I can get it to work, thanks!

[-Stash-] said:
Bother. The 1890 etc didn't work on the p990 in android 4.0.4 (nor on my Nexus 4 incidentally), so I guess I'll have to flash down to GB. I'll let you know if I can get it to work, thanks!
Click to expand...
Click to collapse
Trust me, you can try whatever you want. This is the only way to get it working. I spent hours and hours to figure this out, so I guarantee you it will work.

please,please can u explain better, my imei and baseband is not showing in setings in my phone., i wanted to downgrade into gingerbread stock rom with smart flash, when this happend to me and my sim card its not recognized,. so please explain better with video or pictures steb by step how to apear the sim card, thankyou

interr said:
please,please can u explain better, my imei and baseband is not showing in setings in my phone., i wanted to downgrade into gingerbread stock rom with smart flash, when this happend to me and my sim card its not recognized,. so please explain better with video or pictures steb by step how to apear the sim card, thankyou
Click to expand...
Click to collapse
Your imei should not show in settings, it should show in the back of your battery and when you dial : *#06# into the phone (where you dial numbers for calls).
Cant help you with baseband.
OP here, I am trying to unroot my phone and put stock firmware to get warranty to fix the simcard reader ( i believe it is a hardware issue ).
If I use nvflash and flash any stock firmware I can find on the internet, will that be OK? I have a feeling each region of optimus 2x has slight differences in firmware, eg swedish stock roms and australian stock roms may differ in the default applications etc.
Will it be ok to just install any kind of stock rom for my warranty? Help would be appreciated my warranty is running out in less than a month now.
I also tried to flash stock firmware with CMW, it didnt work. I am about to try NVflash, so I went into greater detail in page 1 but no one replied yet. If you guys know please help. I am more familiar with CMW than NVflash. I have not used NVflash yet.

hahah after 2 sleeples nights i menage to restore my sim to be recognize ,whit this metod,.. NFlash rulles ))
http://www.ibtimes.co.uk/articles/408044/20121124/unbrick-tool-lg-optimus-p990.htm
http://androidadvices.com/unbrick-lg-optimus-2x-p990-android-phone-tutorial/
http://progmaq.es/cm10/progmaq-default-cm-10-20121105.7z
http://progmaq.es/cm10/progmaq-default-cm-10-20121105.7z
this is also the best metod for unbricking your phone, .

INSTALLATION:
ATTENTION
The flasher with NVFlash clears all memory, including the Internal SD., so make a backup if u can..
Download this file: http://bayfiles.com/file/yKZL/eGZ31A/driver.rar The pack includes the APX driver (folder driver)
http://www.putlocker.com/file/4CEDEB7E0893B6F1
1.- Remove the battery to the phone.
2.- Press and hold Vol- and Vol+ and without releasing the 2 keys connect the USB cable to the PC
3.- Go to the progmaq-default-cm-10-20121105 folder and run flash icon... folow instruction., wait wait wait Enjoy!

Custom40 said:
1) Connect your phone by USB.
2) Enter 1809#*990# in dialer.
3) Select Port Setting -> Select CP USB
Click to expand...
Click to collapse
I managed to get an old CM7 install back on the p990,but the above is still not working for me :/
After I finish typing in 1809#*990# in dialer, nothing happens. If I press the green phone handset icon to dial that number it comes up with an error message of "Mobile network not available".
Any further advice? Thanks.

Okay, I failed at reading comprehension – it has to be an LG Gingerbread ROM for this code to work, NOT a CM-based one!
Trying one from somewhere-I-cannot-link-to-yet

Success! Once I was back on the original stock LG Gingerbread ROM, I could reset the IMEI and make/receive calls again using this method. Thank you very much!
Now all flashed back onto a nice "working" nightly CM10.1 and a very happy little device.
Many thanks all.

Hi,
Anyone have a working link to "progmaq-default-cm-10-20121105 ". My Optimus 2x has been bricked as well, and can't find any other version of this on Google unfortunately
Appreciate all help.

[Q] Full signal but not able to make calls HELP

Well i got a problem.
My LG optimus 2x doesn't want to make when it has full signal. And that's ONLY when it has full signal. As soon as I start calling it says call ended. Other people can't call me either. Everything else works fine from internet to messaging (receiving and sending). I have tried numerous basebands (0725 v20q, 0725 v10d, 0218 v10b) and the one I'm on now which is V30A.
I'm currently running stock LG 4.04.
I have tried the phone with a different sim and it still didn't make calls.
Switching to 2G or turning airplane mode on/off doesn't help neither doe turning on wcdma or gsm only signal.
I was installing the basebands with LG P990 All in one ToolKit.
ANY HELP GUYS.
Thanks

Switch to a custom rom ^^

Already tried it doesn't help. I will flash Avatar ROM again but first i want to fix this

Nobody knows? I don't think it hardware since the phone can make calls but only when its not on full signal.

Could it be IMEI problem?
Have you tried a different sim card?

Dial *#06# and see if your imei appears

IMEI problem what do you mean by that?
The IMEI does come up.
And yes i have tried different sim cards with the same result.

Does the displayed imei match with the one printed on the sticker under the battery?

Yep they match.

You have the problem which I had when I was using su660 basebands. As I see you were trying p990 basebands maybe you cold try a su660 baseband. Here's the su660 baseband with it's ril Flash the bb with smartflash, then if you are on stock or stock based rom copy the ril file to /system/lib and set the ril permisson to rw-r--r--

Will try. I'll post back if it works or not.

bitdomo said:
You have the problem which I had when I was using su660 basebands. As I see you were trying p990 basebands maybe you cold try a su660 baseband. Here's the su660 baseband with it's ril Flash the bb with smartflash, then if you are on stock or stock based rom copy the ril file to /system/lib and set the ril permisson to rw-r--r--
Click to expand...
Click to collapse
Looks like i can't past it inside /system/lib because it keeps saying that the system is read only.
Should i Flash Avatar ROM so I have full control?

michalrobeck said:
Looks like i can't past it inside /system/lib because it keeps saying that the system is read only.
Should i Flash Avatar ROM so I have full control?
Click to expand...
Click to collapse
Of course, flash avatar rom or any other which grant you root acces or just root your stock rom, but if you still have that problem without changing ril it just will be a worthless effort.
If you still have that problem try this. Maybe it wil help. I know it is for fixing some kind of wifi-mobileinternet transation thing, but you can give it a try, you will lose nothing. Read carefully the post. I think there is nothing to worry about. I perfomed erase CAL numerous times without no problem. I would recommend putty instead of Hyper Terminal.

same problem
i am also facing the same problem
rom:- tonyp v4
kernal pengus 124
on same kernal but tonyp v3 rom this problem use never occur if tony or any pro can help me out i love his rom
:good: tonyp

bitdomo said:
Of course, flash avatar rom or any other which grant you root acces or just root your stock rom, but if you still have that problem without changing ril it just will be a worthless effort.
If you still have that problem try this. Maybe it wil help. I know it is for fixing some kind of wifi-mobileinternet transation thing, but you can give it a try, you will lose nothing. Read carefully the post. I think there is nothing to worry about. I perfomed erase CAL numerous times without no problem. I would recommend putty instead of Hyper Terminal.
Click to expand...
Click to collapse
Just a quick question do you know what erase CAL does? can i use it while flashing a stock rom with baseband?

michalrobeck said:
Just a quick question do you know what erase CAL does? can i use it while flashing a stock rom with baseband?
Click to expand...
Click to collapse
Erase CAL deletes the calibration data in the radio. By radio I mean that part of the phone which is responsible for catch signal/network. When you perform Erase CAL you lose your IMEI, but you can restore, that forum link I sent describe it how to restore your IMEI after erase CAL.
Answer to your second question: You can only use erase CAL when you flash baseband, and you need stock rom to restore your IMEI.
Why you need stock rom? You need stock rom because it has Hidden menu which is missing from custom roms. Hidden menu is essential to restore your IMEI.
You can find your IMEI on your phone's box or on the sticker under your battery, or type *#06# in the dialer and it will show your IMEI.

I suffered from this problem when I installed Kaspersky Anti-Virus. It automatically enabled its filter and I couldn't make or receive calls, depsite the signal strength or 2g/3g.I disabled the filter and it worked after that. Also, unrelated, but I also suffered from a problem where after a few calls/texts/switching data on/off, I would lose connectivity until the next reboot. I solved it by disabling automatic time and automatically setting the time using the clocksync application from the play store. Hope I helped, good luck.
Sent from my Optimus 2X using xda app-developers app

Help with IMEI Unknown

Good morning,
This cellphone is from a cousin which already sent this phone twice to techservice and it came back this way. Everything seems to be working except that it has no IMEI and no baseband.
What I know is it was never flashed with custom images, just official ones and it is currently with Android 4.4.2.
Any ideas?
Thank you in advance!

fggs said:
Good morning,
This cellphone is from a cousin which already sent this phone twice to techservice and it came back this way. Everything seems to be working except that it has no IMEI and no baseband.
What I know is it was never flashed with custom images, just official ones and it is currently with Android 4.4.2.
Any ideas?
Thank you in advance!
Click to expand...
Click to collapse
Hi, easy way, go to play store and download this apk Network Mode, and change the frecuency of the radio, press the tree pionts ,select Automatic, let he apk works; when finished check your baseand and imei back again, cheers.

Hi! Thanks for your answer! I did exactly what you said, but when I try to select Automatic it just says it failed. Any ideas?!

Hummmm, if you try whit Euro or Usa banda?

Tried every single option, same result

The rom , is an update from a recovery or you douwnload the update fron the ROM?

As far as I know, the update was downloaded from within JellyBean.

One time have the same isue like you, I solved this way, ...............................................

LG P880 (Optimus 4X HD) on android 4.0.3 doesn't have Baseband or IMEI

Greetings,
A long time ago, I bricked my LG P880 coming back from Cyanogenmod to stock version (vía KDZ).
A friend on this post: https://forum.xda-developers.com/op...to-unbrick-stuck-s-update-mode-t2871951/page2 gave a solution which brought my LG P880 back to life, nevertheless I never had chance to keep working on it, until now.
Currently, my LG P880 is on Android Version 4.0.3, without Baseband nor IMEI (both says Unknown), WiFi works, regular Apps work, etc., but it obviously won't recognize SIM Cards or signals.
I have a fresh install of Windows 10, without LG drivers, LG programs or such on my PC, I also have the IMEI of the phone on its box.
Is there any way to upgrade the firmware, fix the IMEI/Baseband or make it work again?
In advance, thank you all for your time
Regards,

alessocf said:
Greetings,
A long time ago, I bricked my LG P880 coming back from Cyanogenmod to stock version (vía KDZ).
A friend on this post: https://forum.xda-developers.com/op...to-unbrick-stuck-s-update-mode-t2871951/page2 gave a solution which brought my LG P880 back to life, nevertheless I never had chance to keep working on it, until now.
Currently, my LG P880 is on Android Version 4.0.3, without Baseband nor IMEI (both says Unknown), WiFi works, regular Apps work, etc., but it obviously won't recognize SIM Cards or signals.
I have a fresh install of Windows 10, without LG drivers, LG programs or such on my PC, I also have the IMEI of the phone on its box.
Is there any way to upgrade the firmware, fix the IMEI/Baseband or make it work again?
In advance, thank you all for your time
Regards,
Click to expand...
Click to collapse
So following your re-animated session : https://forum.xda-developers.com/showpost.php?p=63655636&postcount=18
try "regular/simple" kdz re-flash : https://forum.xda-developers.com/optimus-4x-hd/general/lg-p880-firmware-flash-upgrade-t2919195
(Also take time to check https://forum.xda-developers.com/showthread.php?t=2619702 )
iodak said:
Try to pull dev/block/platform/sdhci-tegra.3/by-name/NVA
Open with text editor.
Check if imei is stored.
This partition is recreated on flashing dz/kdz. I am not sure if IMEI is read from here. If you give email i will send you my NVA partition to compare. Don't post it or people will see your IMEI
Sent from my LG-P880 using xda app-developers app
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Edit : more info, https://forum.xda-developers.com/optimus-4x-hd/help/help-dump-nva-partition-lg-optimus-4x-t3332971