[GUIDE] How to fix "unknown baseband" / "stuck on airplane mode" problem
Today my friend who has a i9100 as I presented the unit with the following problem: not connected in any way in the mobile carrier, airplane mode was stucked.
Well, looking on the internet and especially this forum, I found several solutions to make the flash the original rom to accept that his incredible Samsung Galaxy SII had become an amazing Samsung Play SII. As I'm Brazilian and never give up, here's what worked for me.
---------
Most importantly, use at your own risk. If you are unsure of the steps below, do not do or have someone who has more experience. The procedures worked for me, but does not mean it will work for you.
Special care was always doing this kind of operation in any type of phone: use good quality cables, make sure that there is no bad contacts and preferably make the flash operations with a notebook with the battery at 100% load and phone with 100% load. After all, nobody wants the operation is interrupted and you get a plastic brick.
----
Here are the steps:
1) Download this application: http://forum.xda-developers.com/showthread.php?t=1308546. EFS Pro serves to backup / restore partition EFS.
2) To use EFS Pro, your phone must be enabled with the root. To do this, follow:
2.a) Paving the way for SuperOneClick: http://forum.xda-developers.com/showthread.php?t=1056334
2.b) Using SuperOneClick to "open legs": http://forum.xda-developers.com/showthread.php?t=803682
2.c) Now, some screwdrivers and screws inside your device: https://market.android.com/details?...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.
Hi, ljlima,
thanks for your report, I'am Brazilian too, but I'm almost giving up
Completely disappointed with this ****ty problem... Made a hard reset typing a code in phone keypad (since I could not access ID samsung in factory reset) and nothing...
Very afraid of following your instructions since I'am totally newbie and there is no replies confirming your method.
Is there a chance of solving this by upgrading android version (although KIES is crappy as hell) or other non invasive and easier method ?
thank you!
Samsung Galaxy SII
2.3.3
kernel version
2.6.35.7-I9100XWKE2-CL187606 [email protected] #2
GINGERBREAD.XWKE2
ljlima said:
4) Give the problem phone a boot and see the problem disappear.
Click to expand...
Click to collapse
But the IMEI will be 0049...
THANK YOU THANK YOU THANK YOU!
SAVED MY GALAXY SII from Bell
Also, sometimes, if your /EFS is not totally corrupted, you can just reflash your modem. I had issues with this on CM7 nightlies, and my problem was always solved with a simple reflash. Its easier than restoring your whole /EFS backup, and a lot quicker. But, mind this is only if your /EFS isn't done for.
Thnx a lot. for refreshind download links.
any one confirm the success of this method?
Confirmed Solution
This worked for me!!! You can find this software on net. Search with GSII_Repair. This works for sure!!! This can be downloaded from Google Play Market also. Available for free!!!
ghassir said:
Thnx a lot. for refreshind download links.
any one confirm the success of this method?
Click to expand...
Click to collapse
"lambergino" user tryed on january and works. And I wrote this post after resolve my friend problem.
"Unknown" baseband on a non-rooted SGS2!
Help!
My SGS2 suddenly would not recognize any SIM after a failed attempt at backing up my files using the sh!tty Kies software.
All I did was make a backup using Kies and somehow it got stuck "Preparing". I left it overnight and in the morning, when I checked, it still didn't go through the backup process - just kept saying preparing. Anyway, I decided to cancel it as I needed to use my phone already. I clicked on the cancel button and guess what? It also got stuck in cancelling! I left it and went to shower and when I got back after about 15 minutes (probably longer), it still didn't cancel. Frustrated, I plugged the USB cable out. Later that day, I noticed that I didn't receive any SMS/call. Then, I noticed that the notification bar displayed the "no signal" icon. I rebooted my phone, hoping the signal would return. But, I still got no signal after it switched on.
I did a factory reset, hoping it will put everything back to normal. I used the volume+power key combination as the factory reset option under Settings, somehow, would not work. Anyway, after doing the factory reset, it still wouldn't connect to the network.
I then noticed that the About screen displayed an "Unknown" baseband version.
From what I read from this thread and several other forums, this could be due to a corrupted /efs partition, which could have resulted from improperly rooting/flashing the device. However, I never rooted my phone in the first place!!!
And I heard the ICS update is rolling out now but I can't update because, somehow, Kies won't connect to my phone anymore!!!
My phone now is practically a very expensive music player. THIS IS SO FRUSTRATING!!!
Please help, anyone!
Hi there
I have a I9100G with missing IMEI and Baseband. Can I use your I9100 EFS file on my I9100G ?
Or is there someone who can provide EFS files for I9100G?
Thanks in advance!!!
Regards
Please try one these solutions
ljlima said:
Today my friend who has a i9100 as I presented the unit with the following problem: not connected in any way in the mobile carrier, airplane mode was stucked.
Well, looking on the internet and especially this forum, I found several solutions to make the flash the original rom to accept that his incredible Samsung Galaxy SII had become an amazing Samsung Play SII. As I'm Brazilian and never give up, here's what worked for me.
---------
Most importantly, use at your own risk. If you are unsure of the steps below, do not do or have someone who has more experience. The procedures worked for me, but does not mean it will work for you.
Special care was always doing this kind of operation in any type of phone: use good quality cables, make sure that there is no bad contacts and preferably make the flash operations with a notebook with the battery at 100% load and phone with 100% load. After all, nobody wants the operation is interrupted and you get a plastic brick.
----
Here are the steps:
1) Download this application: http://forum.xda-developers.com/showthread.php?t=1308546. EFS Pro serves to backup / restore partition EFS.
2) To use EFS Pro, your phone must be enabled with the root. To do this, follow:
2.a) Paving the way for SuperOneClick: http://forum.xda-developers.com/showthread.php?t=1056334
2.b) Using SuperOneClick to "open legs": http://forum.xda-developers.com/showthread.php?t=803682
2.c) Now, some screwdrivers and screws inside your device: https://market.android.com/details?...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.
Click to expand...
Click to collapse
Braidonh said:
Also, sometimes, if your /EFS is not totally corrupted, you can just reflash your modem. I had issues with this on CM7 nightlies, and my problem was always solved with a simple reflash. Its easier than restoring your whole /EFS backup, and a lot quicker. But, mind this is only if your /EFS isn't done for.
Click to expand...
Click to collapse
scorypto said:
This worked for me!!! You can find this software on net. Search with GSII_Repair. This works for sure!!! This can be downloaded from Google Play Market also. Available for free!!!
Click to expand...
Click to collapse
You need to try one of these.
None of this works for me, I tried everything
Any other advice
Regards
Service centre or JTag repair .
jje
gordskin
ljlima said:
Today my friend who has a i9100 as I presented the unit with the following problem: not connected in any way in the mobile carrier, airplane mode was stucked.
Well, looking on the internet and especially this forum, I found several solutions to make the flash the original rom to accept that his incredible Samsung Galaxy SII had become an amazing Samsung Play SII. As I'm Brazilian and never give up, here's what worked for me.
---------
Most importantly, use at your own risk. If you are unsure of the steps below, do not do or have someone who has more experience. The procedures worked for me, but does not mean it will work for you.
Special care was always doing this kind of operation in any type of phone: use good quality cables, make sure that there is no bad contacts and preferably make the flash operations with a notebook with the battery at 100% load and phone with 100% load. After all, nobody wants the operation is interrupted and you get a plastic brick.
----
Here are the steps:
1) Download this application: http://forum.xda-developers.com/showthread.php?t=1308546. EFS Pro serves to backup / restore partition EFS.
2) To use EFS Pro, your phone must be enabled with the root. To do this, follow:
2.a) Paving the way for SuperOneClick: http://forum.xda-developers.com/showthread.php?t=1056334
2.b) Using SuperOneClick to "open legs": http://forum.xda-developers.com/showthread.php?t=803682
2.c) Now, some screwdrivers and screws inside your device: https://market.android.com/details?...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.
Click to expand...
Click to collapse
YOu are lifesaver, it actually worked after I have tried 100's of difernet thinks. Thanks:good:
need your help
gordskin said:
YOu are lifesaver, it actually worked after I have tried 100's of difernet thinks. Thanks:good:
Click to expand...
Click to collapse
please can you share wich way helped you !!!
Your Fix
ljlima said:
Today my friend who has a i9100 as I presented the unit with the following problem: not connected in any way in the mobile carrier, airplane mode was stucked.
Well, looking on the internet and especially this forum, I found several solutions to make the flash the original rom to accept that his incredible Samsung Galaxy SII had become an amazing Samsung Play SII. As I'm Brazilian and never give up, here's what worked for me.
---------
Most importantly, use at your own risk. If you are unsure of the steps below, do not do or have someone who has more experience. The procedures worked for me, but does not mean it will work for you.
Special care was always doing this kind of operation in any type of phone: use good quality cables, make sure that there is no bad contacts and preferably make the flash operations with a notebook with the battery at 100% load and phone with 100% load. After all, nobody wants the operation is interrupted and you get a plastic brick.
----
Here are the steps:
1) Download this application: http://forum.xda-developers.com/showthread.php?t=1308546. EFS Pro serves to backup / restore partition EFS.
2) To use EFS Pro, your phone must be enabled with the root. To do this, follow:
2.a) Paving the way for SuperOneClick: http://forum.xda-developers.com/showthread.php?t=1056334
2.b) Using SuperOneClick to "open legs": http://forum.xda-developers.com/showthread.php?t=803682
2.c) Now, some screwdrivers and screws inside your device: https://market.android.com/details?...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.
Click to expand...
Click to collapse
Will this work in Germany? I have the same problem. Can I use your baseband since I dont have a donor Handy SII? I have been racking my brain for 3 days trying to correct this.
ScottsDesk said:
Will this work in Germany? I have the same problem. Can I use your baseband since I dont have a donor Handy SII? I have been racking my brain for 3 days trying to correct this.
Click to expand...
Click to collapse
As I said, try it on own risk. But I think that will work because other international users tried and worked, as you can see in this thread.
Good luck.
Donor EFS backup file needed..
Hi, I need a donor file compatible with EFSPro the links given in OP post have a .tar file whereas the latest version of EFS Pro works with a tar.gz with .img file in it.
I have also tried to replace the nv_data.bin file with the .bak version but the folder is Read only and I cannot over write the original file.
Any help is appreciated.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.[/QUOTE]
ljlima said:
Today my friend who has a i9100 as I presented the unit with the following problem: not connected in any way in the mobile carrier, airplane mode was stucked.
Well, looking on the internet and especially this forum, I found several solutions to make the flash the original rom to accept that his incredible Samsung Galaxy SII had become an amazing Samsung Play SII. As I'm Brazilian and never give up, here's what worked for me.
---------
Most importantly, use at your own risk. If you are unsure of the steps below, do not do or have someone who has more experience. The procedures worked for me, but does not mean it will work for you.
Special care was always doing this kind of operation in any type of phone: use good quality cables, make sure that there is no bad contacts and preferably make the flash operations with a notebook with the battery at 100% load and phone with 100% load. After all, nobody wants the operation is interrupted and you get a plastic brick.
----
Here are the steps:
1) Download this application: http://forum.xda-developers.com/showthread.php?t=1308546. EFS Pro serves to backup / restore partition EFS.
2) To use EFS Pro, your phone must be enabled with the root. To do this, follow:
2.a) Paving the way for SuperOneClick: http://forum.xda-developers.com/showthread.php?t=1056334
2.b) Using SuperOneClick to "open legs": http://forum.xda-developers.com/showthread.php?t=803682
2.c) Now, some screwdrivers and screws inside your device: https://market.android.com/details?...t=W251bGwsMSwxLDEsInN0ZXJpY3Nvbi5idXN5Ym94Il0.
3) Now the easy part, get another Galaxy S2 to be the "donor" baseband. You do not? Download mine by this link:
https://hotfile.com/dl/149885347/a004c04/EFS_20111227_235358.tar.html or https://rapidshare.com/files/2401446638/EFS_20111227_235358.tar. If you use my baseband, skip to step 3.b.
3.a) Pick up the phone "donor", run the EFS Pro and select the backup option. To accelerate the process, ask to put the backup on the sdcard. There, he set up and placed in the / sdcard / EFSProBackup.
3.b) Copy / Create the folder / sdcard / EFSProBackup problem to the phone with the same path.
3.c) EFS Pro back in, ask to restore the backup from the device (will find the file you copied) and ready.
4) Give the problem phone a boot and see the problem disappear.
----
This is my first post and hopefully it will be useful. Pay me a beer if you like it.
Click to expand...
Click to collapse
dud id used your EFS...i did not work for me...i then factory reset my phone.,..now there is an input password when opening the phone! now i totally cant acces my phone because of this password...pin code...
SIM Pin or Network Code?
Either way your IMEI must be back.
Sent from the little guy
Hello everyone,
as stated in the title, I've somehow lost my Imei nr on my internat. sgsIII. Now, since I am a bloody newbie I don't have any clue how to fix this problem. It just started a couple weeks ago by itself with the message "not registered in network" and that I could not use the phone anymore, only through wifi. Since then I obviously made a huge mistake by taking it too easy fixing that problem on my own. Before the problem appeared, I've never rooted nor manipulated my phone in any way (I did not knew how or what "root" is), after my problem occured I've rooted my phone several times, "flashed" via Odin 3 my phone with div. firmwares etc. and now I understand that I really messed it up and lost the trail. I don't know where to start or what to look for. My "efs-folder" is now empty and since I am ignorant to this, I never made a backup of the efs-folder.
Acc. to my phone:
Imei is: 0049. . . . . . (developer Imei)
ImeiSV: 01
serial Nr: 4df184. . . . . (which seems strange)
Android Vers: 4.3
Baseband: I9300XXUGNA8
Kernel Ver: 3.0.31-2713958
[email protected]#1
BuildNr: JSS15J,I9300XUGNG3
My phone is now rooted via cf autoroot
Can anyone help me? I hope you people could bring me back to trail, I thank you in advance
(sorry for my english)
Take it to a repair centre, unless you can find an efs backup on your sd card (some custom roms make a copy).
Make sure it works on 4.3 before you pay the repair bill.
boomboomer said:
Take it to a repair centre, unless you can find an efs backup on your sd card (some custom roms make a copy).
Make sure it works on 4.3 before you pay the repair bill.
Click to expand...
Click to collapse
I try to avoid that one. . . . I do have somekind of an efs copy from my phone on my PC but I guess it is just a copy of a regenerated efs folder after I flashed my phone with a new firmware. I can't read the contain of that copy it says something like:
(folder) bluetooth
(folder) carrier
(folder) drm
(folder) factoryApp
(folder) imei (contains: mps_code.dat)
(folder) wifi
0000000 authokcont
gyro_cal_data
h2k.dat
nv.log
nv_data.bin
nv_data.bin.md5
wv.keys
thx&greetings
Ok. So here's the deal:
My SGS3 I9300 exynos phone did the famous IMEI 0049 and SN null trick.
I cannot say what precipitated it but is simply stopped registering on the network, so no calling or data. All other functions operational.
After much searching and reading, I settled on flashing the stock 4.3 back. This succeeded only in doing absolutely nothing to alleviate this issue. I wiped the entire phone. Maybe I missed a critical section wipe, but since the stock ROM overwrites all? the CSC/BL/MODEM functions I thought it would set the default for EFS (which I believe is where these critical data live). I'm not a programmer so I cannot say diddly about the architecture and interrelationship of OS files, but I am technical and I know how SW and HW does what it does.
This phone is my own and I have all the rights to it.
I had loaded RRemix ROM a loong while ago and it was functioning fine. Probably a corruption of the EFS due to battery contact being loose. This is in my mind the most likely cause as the system may be accessing the EFS files, say making a call, or accessing data, and the power drops out and voila! Corruption. But again this is theoretical.
Needless to say I tried the usual hocus-pocus out there with no avail.
Getting to understand the system better it seems obvious that these critical identification numbers are hard-coded into the chips on the phone. Which explains the ability to 'fix' them with JTAG and other cable/box solutions and SW. However, I cannot see how the SW loses the ability to read the IMEI/SN that is hard-coded (fused?) into the main-board.
All my research pointed to the EFS files having something to do with this.
Way back when I loaded the custom ROM I did not come across the 'backup your EFS' as a necessary step, so I had nothing to go back on.
And loading the stock 4.3 ROM back on and not having that fix the issue, led me to believe something else was up.
Somewhere in the guts of this phone something is screwing up the layer between reading the registers where the numbers sit and the software layer that reports the numbers.
So, much searching led to the nv_data.bin file being a key component in all this fiasco.
Now, before I say any more, I believe that describing the next steps could be a big no-no here.
Now, understand, all I want to do is get MY personal device working again. I have the SN and IMEI numbers on the physical device.
Sure, I could have stolen it and am attempting to change these to avoid prosecution. Anyone can say anything online.
Therefore, before I can proceed, I need advice from moderators and VPP to either say 'Yes you may post this info' or 'No. Go away'.
Am I allowed to do the following:
1) Describe how I restored my IMEI (Not changed, overwritten, or subverted to my limited knowledge)
2) In the case of 1 not allowed, post the link to where I found the info to achieve this.
3) Submit the 'fix' to a moderator or developer to check whether this is indeed and restoration or a change.
If it's a restoration of existing functionality, I cannot see how this could be a problem. If its changing something, then it's a whole other sack of ferrets.
My reasons for posting are that xdadevelopers has given me years of joy with my SG devices. (Yes, I have the whole range exclusively) Many ROMS, customs, fixes, hints and saves deserves something back, and the difficulty in achieving this particular fix, warrants it.
But I don't want to break any rules, this being my first post.
So, please let me know what I can do to help others stuck in this position...
You can find it if you have the correct search parameters. Perhaps I can say that instead?
Thanks.
And thanks to all who have helped over the years.
T
[Edit] Just to clarify, the solution requires no special HW or 'boxes'. You do need root, however, and a hex editor. I had a reply explaining the use of Octoplus, which requires credits and registration. You will need none of those.
I can't speak English but I will try.
1- flash stock firmware.
2- root your device s3 .
3-in the web download " octuplus crack box"
4-in youtube see how install " octuplus crack"
5- before install stop your antivirus PC
6- open octuplus and connecte your phone with PC
7- chose your device i9300 .
8 click repair imie
9 click read info and do what OCTU said to do.
10- click repair or write the true imie in your device ( remove battery to see)and click repair.
11- restart phone .
12- see: call work fine
13- in phone go to mobile network\ access point names\ apn's
14- write your network.
TrinityTrip54 said:
Ok. So here's the deal:
Repair is ok Change or Modding is now:good::good::good:
Click to expand...
Click to collapse
How to restore corrupted or null 0049 IMEI on SGS3.
Right.
Thanks to the moderators for agreeing to let me share the solution. :good:
Thanks to the reddit poster who found this solution. I don't know how the hell you figured this out, but big-ups to you. For privacy I will not mention names or addresses.
You do need a rooted phone and I cannot assist anyone without root as I have not tried it.
Whether this only works to restore a corrupt IMEI or change it, I cannot say, but it managed to restore my existing one.
Preparation: Get your IMEI number from under your battery compartment. Say your IMEI no. is: 123456789101213, write/type it in the following fashion: 1 23 45 67 89 10 12 13
Now some funky transposition: Excluding the first number, transpose the subsequent pairs of numbers so that you have: 1 32 54 76 98 01 21 31. Can you see it? Swap 23 to get 32. 45 to get 54 and so on.
Now add 08 to the beginning and add A after the 1 so that the completed number is: 08 1A 32 54 76 98 01 21 31
Now you will need:
Rooted Galaxy S3 (This may work for all android devices that have an EFS folder. If anyone can confirm that would help others.)
Hex editor (PC based or Android app) - PC is faster and easier. I used hex workshop trial version but I'm sure any editor will do. I used the default install configuration.
USB Data cable (if using PC editor mentioned above)
You should probably back up the EFS folder entirely, just to be sure.
Using your favorite root explorer browse to root/EFS folder and copy the nv_data.bin file to an accessible area in sdcard. I use a /sdcard/Downloads folder.
Either open the file with your hex editor app or transfer the file to PC where you can open it with your hex editor program.
Open the file and jump to address 00550.
Now, get your modified IMEI number from the prep steps above and enter the values in the ASCII TEXT window to the right, NOT the HEX values window to the left. This may be different for other editors but hex workshop works like this.
Double check your address and entered data. When satisfied, save the file and transfer back to the phone if copied to PC.
Now, place the phone in Airplane mode, turning off the cell radios.
Go to the EFS folder and rename the original nv_data.bin file to something else. I used nv_databak.bin.
Copy the modified nv-data file into the EFS folder.
Turn off Airplane mode and do a full reboot.
Your IMEI number should be restored and cellular functions should work.
My previously garbled serial number was also restored.
I hope this works for you. I have no knowledge of any other method as I did not delve further into trying other numbers or such. I can't assist any more other than further clarifying the steps above if you don't understand something.
If anyone can decipher what is going on here, I would love to hear about it. I suspect something between the HW and SW layers is getting garbled or corrupted and this kick starts the process to get the correct data again.
Maybe.
May also contain nuts.
Hastalavista.
T
THANKS FOR POSTING THIS HERE!
I have this Samsung Galaxy S3 that I bricked 4 years ago and never wanted to sell it or even try to give it away. I searched for months for a frekin solution to this problem. Yesterday night i decided i wanted to try and install custom roms on it and so i wanted to give another shot at this stupid issue i had with the lost IMEI before doing so...and BAM! Today it's fixed!
I'm so thankfull I wanted to post here so that you know that you helped at least one person with this
Thanks a bunch!
@TrinityTrip54
Hi,
can you confirm that this is a permantent solution and remains when flashing new (custom) ROMs? Or is it just for the current installed ROM?
And I am having an issue with "jump to address 00550" in Hex Workshop. There is no address like this, just 540 and the next one is already 558. When inserting 00550 in the goto search field of Hex Workshop it jumps to 210. Any idea?
thanks anyway.
bert