How to fix LG G2 with IMEI issue

[kingroach]

Long story short, I bricked my lg g2 d801 after flashing twrp recovery and trying to flash custom rom. The phone would restart randomly. I had no connection and the signal bars crosses out in red. In settings most of my info like baseband, imei etc were missing. I was looking up and many people bricked their phones with no EFS backup to restore the IMEI. This is how I fixed my phone. This should also help people who have zeroed out IMEI after bad flash or whatever reason. But you should at least have IMEI number ready (from your box/ receipt or call t-mobile)

1. Flashed the phone to factory firmware using LG support tool. I used the following guide:
http://androidcure.com/unbrick-lg-g2-stock-firmware/

used the firmware: T-Mobile KitKat D80120A_00.kdz

there's also similar guides in xda, follow whichever you prefer. Goal is to revert the phone back to stock.

After flashing the phone, the phone was woking; however imei was null. In phone settings my IMEI was 0. To fix the null/bad imei follow this guide (Not all the steps are my work; this guide helped me http://xdaforums.com/showthread.php?t=1942417 , also watched some you tube videos):

2. You need the following drivers and software:
LGUnitedMobileDriver_S50MAN310AP22_ML_WHQL_Ver_3.10.1
QPST_2.7_378
imei converter: http://www.sendspace.com/file/a3spfh

3. After installing the driver; turn on USB debugging and connect the phone to computer

4. Install QPST, run QPST configuration from from start menu

5. Click on Ports tab. Click Add new port. Your phone should be COM4/5. It will say USB after the port. Select the port and click OK.

6. The port should come up on active phones. Select the phone and and click on "Software Download" from start clients menu

7. Click on Backup tab. Your port should appear. Backup by clicking on start

8. Now go to Program Files/qualcomm/qpst/bin folder

9. Run RF_NV_Manager program

10. Click File read from phone. Your IMEI should appear on number 550; NV_UE_IMEI_I

11. In my case; there was no item 550 as my IMEI was missing. Don't worry.

12. Click on file> Read supported RF NV items

13. Now click on item 550. It should show 9 blank fields.

14. Start IMEI converter. Type in your IMEI in enter IMEI click on convert IMEI

15. There will be 18 digits in groups of 9

18. In RF_NV_Manager program; click on Hex by Write NV button

19. IN the 9 boxes; type in the numbers from IMEI converter starting from left. Type in first group of two numbers in the first field, then go to the next field and type in second 2 digits

20. After you fill in; click on write NV

21. Now click on File> Read from phone. NV item number 550 should appear now.

22. Unplug, Restart your phone and your IMEI number should be there and phone should connect to network.


Above process fixed my phone with full 4G LTE data. Now depending on the how bad your EFS was damaged; you might not get 4G lte data. But at least now; you will be able to send the phone back to LG for repair or return to t-mobile as IMEI number will be in your phone.

 

[lyriquidperfection]

You can do this with EFS Professional. It does all the conversion for you and you dont need QPST. Just simply type in IMEI and write to device.

Sent from my LG-D802 using Tapatalk

 

[tpaxadpom]

I've tried the this guide and it didn't work for me. I get an error when I try to write NV. The good news is that I don't have an immediate need to change/fix IMEI but I was wondering if it ever gets zeroed out I have a way to restore it. I will give your tool a try.

 

[tpaxadpom]

You can do this with EFS Professional. It does all the conversion for you and you dont need QPST. Just simply type in IMEI and write to device.

Sent from my LG-D802 using Tapatalk

So the EFS Professional is compatible with phones other than Samsung? Once I've unzipped the file I see a bunch of binaries for Samsung phones, but nothing for LG G2. When I try to run it generates an error the app is for Samsung devices only... Where can I get a compatible binary for LG G2 or EFS professional that works with LG G2?

I've tried Qualcomm NV Tools instead of EFS Professional and I cannot create a backup. When backup is being created it errors out saying the device has been disconnected... Also if I write the IMEI it says it was accepted but it doesn't change.
PS: I should probably start screweing around with these apps since I may introduce the problem. My IMEI is fine.

 

[lyriquidperfection]

So the EFS Professional is compatible with phones other than Samsung? Once I've unzipped the file I see a bunch of binaries for Samsung phones, but nothing for LG G2. When I try to run it generates an error the app is for Samsung devices only... Where can I get a compatible binary for LG G2 or EFS professional that works with LG G2?

I've tried Qualcomm NV Tools instead of EFS Professional and I cannot create a backup. When backup is being created it errors out saying the device has been disconnected... Also if I write the IMEI it says it was accepted but it doesn't change.
PS: I should probably start screweing around with these apps since I may introduce the problem. My IMEI is fine.

Imei will only write if zeroed out. You are correct, EFS Professional is for samsung devices but the Qualcomm NV Tools is universal. I am currently in the middle of updating it so more features can be used on other devices.

Sent from my LG-D802 using Tapatalk

 

[tpaxadpom]

Imei will only write if zeroed out. You are correct, EFS Professional is for samsung devices but the Qualcomm NV Tools is universal. I am currently in the middle of updating it so more features can be used on other devices.

Sent from my LG-D802 using Tapatalk

got it. Thank you.

 

[kamaleonico]

Ey guys , im new in this foro. Sorry but my english.....i have a LG D802 , the imei said unkown ....I tried the method in this post but always obtain error when i use RF_NV_Manager , when i trie to read files from phone give me an error...the phone bricked when install a new custom rom.
Help please.....

 

[kamaleonico]

the driver is correctly and the program detect the phone in port 26...

 

[kamaleonico]

the error is this....

 

[kingroach]

the error is this....

did you try restoring the the phone with flash tool first?..

 

[maxx_nantes]

thank you so much, just did it and it worked perfectly fine !

 

[aplsux]

Long story short, I bricked my lg g2 d801 after flashing twrp recovery and trying to flash custom rom. The phone would restart randomly. I had no connection and the signal bars crosses out in red. In settings most of my info like baseband, imei etc were missing. I was looking up and many people bricked their phones with no EFS backup to restore the IMEI. This is how I fixed my phone. This should also help people who have zeroed out IMEI after bad flash or whatever reason. But you should at least have IMEI number ready (from your box/ receipt or call t-mobile)

1. Flashed the phone to factory firmware using LG support tool. I used the following guide:
http://androidcure.com/unbrick-lg-g2-stock-firmware/

used the firmware: T-Mobile KitKat D80120A_00.kdz

there's also similar guides in xda, follow whichever you prefer. Goal is to revert the phone back to stock.

After flashing the phone, the phone was woking; however imei was null. In phone settings my IMEI was 0. To fix the null/bad imei follow this guide (Not all the steps are my work; this guide helped me http://xdaforums.com/showthread.php?t=1942417 , also watched some you tube videos):

2. You need the following drivers and software:
LGUnitedMobileDriver_S50MAN310AP22_ML_WHQL_Ver_3.10.1
QPST_2.7_378
imei converter: http://www.sendspace.com/file/a3spfh

3. After installing the driver; turn on USB debugging and connect the phone to computer

4. Install QPST, run QPST configuration from from start menu

5. Click on Ports tab. Click Add new port. Your phone should be COM4/5. It will say USB after the port. Select the port and click OK.

6. The port should come up on active phones. Select the phone and and click on "Software Download" from start clients menu

7. Click on Backup tab. Your port should appear. Backup by clicking on start

8. Now go to Program Files/qualcomm/qpst/bin folder

9. Run RF_NV_Manager program

10. Click File read from phone. Your IMEI should appear on number 550; NV_UE_IMEI_I

11. In my case; there was no item 550 as my IMEI was missing. Don't worry.

12. Click on file> Read supported RF NV items

13. Now click on item 550. It should show 9 blank fields.

14. Start IMEI converter. Type in your IMEI in enter IMEI click on convert IMEI

15. There will be 18 digits in groups of 9

18. In RF_NV_Manager program; click on Hex by Write NV button

19. IN the 9 boxes; type in the numbers from IMEI converter starting from left. Type in first group of two numbers in the first field, then go to the next field and type in second 2 digits

20. After you fill in; click on write NV

21. Now click on File> Read from phone. NV item number 550 should appear now.

22. Unplug, Restart your phone and your IMEI number should be there and phone should connect to network.


Above process fixed my phone with full 4G LTE data. Now depending on the how bad your EFS was damaged; you might not get 4G lte data. But at least now; you will be able to send the phone back to LG for repair or return to t-mobile as IMEI number will be in your phone.

Hey kingroach, amazing guide, wonderful!

I followed everything step by step. Right now I have some generic IMEI which does not work, I'm trying to write my original one back, but at step 20, when I click "Write NV", the numbers change, the Hex unchecks and the popup comes out. When I close it, Hex goes back to being checked and numbers return to what I made them. and I get this popup:

Here's a video.

You can do this with EFS Professional. It does all the conversion for you and you dont need QPST. Just simply type in IMEI and write to device.

Sent from my LG-D802 using Tapatalk

Hi, thank you for your help too in these threads. I tried EFS Pro, everything checks out, it says IMEI written, but when phone is restarted, nothing has changed. Do you know if EFS Pro need some other setting enabled to actually change the IMEI?

 

[kingroach]

Try deleting 550 nv item which contains the imei and save. Restart the phone and add it.

 

[aplsux]

Try deleting 550 nv item which contains the imei and save. Restart the phone and add it.

nope, it dont work
im genuinly surprised the procedure works for lg g2 and not for nexus 5

 

[asterix005]

how did you delete item 550?

 

[aplsux]

how did you delete item 550?

I couldn't - you try with the custom list, under tools I think. You move item 550 from the right column, and it dissappears, but when I read NV phone items, its there. It's untouchable I tell you!:silly:

 

[hoangthuyebvttb]

Long story short, I bricked my lg g2 d801 after flashing twrp recovery and trying to flash custom rom. The phone would restart randomly. I had no connection and the signal bars crosses out in red. In settings most of my info like baseband, imei etc were missing. I was looking up and many people bricked their phones with no EFS backup to restore the IMEI. This is how I fixed my phone. This should also help people who have zeroed out IMEI after bad flash or whatever reason. But you should at least have IMEI number ready (from your box/ receipt or call t-mobile)

1. Flashed the phone to factory firmware using LG support tool. I used the following guide:
http://androidcure.com/unbrick-lg-g2-stock-firmware/

used the firmware: T-Mobile KitKat D80120A_00.kdz

there's also similar guides in xda, follow whichever you prefer. Goal is to revert the phone back to stock.

After flashing the phone, the phone was woking; however imei was null. In phone settings my IMEI was 0. To fix the null/bad imei follow this guide (Not all the steps are my work; this guide helped me http://xdaforums.com/showthread.php?t=1942417 , also watched some you tube videos):

2. You need the following drivers and software:
LGUnitedMobileDriver_S50MAN310AP22_ML_WHQL_Ver_3.10.1
QPST_2.7_378
imei converter: http://www.sendspace.com/file/a3spfh

3. After installing the driver; turn on USB debugging and connect the phone to computer

4. Install QPST, run QPST configuration from from start menu

5. Click on Ports tab. Click Add new port. Your phone should be COM4/5. It will say USB after the port. Select the port and click OK.

6. The port should come up on active phones. Select the phone and and click on "Software Download" from start clients menu

7. Click on Backup tab. Your port should appear. Backup by clicking on start

8. Now go to Program Files/qualcomm/qpst/bin folder

9. Run RF_NV_Manager program

10. Click File read from phone. Your IMEI should appear on number 550; NV_UE_IMEI_I

11. In my case; there was no item 550 as my IMEI was missing. Don't worry.

12. Click on file> Read supported RF NV items

13. Now click on item 550. It should show 9 blank fields.

14. Start IMEI converter. Type in your IMEI in enter IMEI click on convert IMEI

15. There will be 18 digits in groups of 9

18. In RF_NV_Manager program; click on Hex by Write NV button

19. IN the 9 boxes; type in the numbers from IMEI converter starting from left. Type in first group of two numbers in the first field, then go to the next field and type in second 2 digits

20. After you fill in; click on write NV

21. Now click on File> Read from phone. NV item number 550 should appear now.

22. Unplug, Restart your phone and your IMEI number should be there and phone should connect to network.


Above process fixed my phone with full 4G LTE data. Now depending on the how bad your EFS was damaged; you might not get 4G lte data. But at least now; you will be able to send the phone back to LG for repair or return to t-mobile as IMEI number will be in your phone.

i tried. but at step 5, my my PC said "No Phone". can you help me ????

 

[jaed.43725]

I keep getting
Exception Thrown!!
NvManager::getNvItemsFromPhone( const string comport )-
QpstServer::sendSyncImpl - Bad response from phone (DM packet
commands 19-24)

Any ideas? Please tag me in this.

 

[kingroach]

Did you first reflash the stock rom? Someone was getting similar error and flashing stock rom fixed it.

 

[JUSMEJOSE]

Use EFS Professional to write your Original IMEI ....