Database Users

[FIX] Corrupt EFS - When downgraded from 4.3 to 4.2.2

TD:LR Get back to Stock ROM for your country and then restoring EFS the backup will help in getting back your IMEI.
Click to expand...
Click to collapse
Requirements
1. Stock country ROM + Rooted if necessary
2. Any EFS backup
3. Same tool used in (2) to restore it back.
Situation
Currently I was 4.3 XXUGML2 ArchiDroid V1.7.3. Faced a lot of issues with any 4.3 ROM i tried. So I though I will go back to 4.2.2 OXAME7 [EFS v1] which was real stable for me. I flashed 4.2.2 again via Odin. After successful boot I had lost my IMEI where the code was generic 0049***. Here are the things I tried to do:
1. I had efs.tar.gz file which I had created when I was on 4.2.2 before flashing 4.3 with help of kTool. I tried to restore the same with help of the same app, but that did not work at all.
2. I had made EFS backup via custom backup and restore of Philz CWM Recovery. But that backup was in Internal SD. After I had flashed 4.2.2 from 4.3 with Odin the internal was completely wiped. So I had lost my 2nd and final alternative backup.
3. Tried to flash XXEMG4 modem which is actually EFS v2 modem, but that too didn't solve the issue.
Now why did this happen?
I am not sure, but my guess was that this happened because the 4.2.2 ME7 ROM had EFS v1 path whereas the 4.3 ROM was EFS v2 path. Any other possible reasons?
The Fix
As a last resort
1. I downloaded the Stock ROM for my country (India) which is XXEMH4 via odin --> No IMEI yet
2. Tried to restore the EFS via kTool again.
3. Profit + hefty amount of relief.
It was a great relief for me to see the IMEI back and thought of sharing it here. Hope this information will be helpful to others. :good:
Edit:
I think this method too would have helped, but did not bump into this thread earlier: http://forum.xda-developers.com/showthread.php?t=2531221

Well this work with S4 too?

kachrukamble said:
Well this work with S4 too?
Click to expand...
Click to collapse
I'm not sure.. But flashing stock ROM and then restoring EFS can be applied to any Samsung phone with IMEI issues as last resort.
Sent from my GT-I9100 using Tapatalk

Mod Edit
Please refer to the stickies in General before posting.
Thread closed
malybru
Forum Moderator

Galaxy note 3 sm-n900 Unkonwn baseband

hello Guys, i have a galaxy note 3 sm-n900 on my hand right now, the problem is that i have no data, unknown baseband and no imei (Null/Null)......is there any solution ??? thank you...

In normal case all this missing comes from factory, if you need help from others you must explain how this happened, what rom you are using etc etc
Sent from my SM-N9005 using XDA Free mobile app

Byakuya88 said:
hello Guys, i have a galaxy note 3 sm-n900 on my hand right now, the problem is that i have no data, unknown baseband and no imei (Null/Null)......is there any solution ??? thank you...
Click to expand...
Click to collapse
Flash a Stock N900 ROM and hope for the best.

nicholaschum said:
Flash a Stock N900 ROM and hope for the best.
Click to expand...
Click to collapse
thank you for your answer, i flashed the last 4.4.2 firmware but it's the same thing.....

Byakuya88 said:
thank you for your answer, i flashed the last 4.4.2 firmware but it's the same thing.....
Click to expand...
Click to collapse
May be your imei data was corrupt.
Did you make backup for the EFS data?
If so just restore it.

i have the same issue with a friends phone, no EFS backup, he won't tell what he did to the phone but now imei is null/null and doesn't have a baseband, anyway to fix it?

jdomadia said:
In normal case all this missing comes from factory, if you need help from others you must explain how this happened, what rom you are using etc etc
Sent from my SM-N9005 using XDA Free mobile app
Click to expand...
Click to collapse
similar problem
I have a sm-n900 exynos and I have lost my imei and baseband during a Samsung flash. I have a TWRP backup, efs.img backup by dr.ketan's backup tool but nothing is able to restore my efs. I have scanned emmc blocks for bricked blocks and all blocks come back as non-corrupted. may be the partition is corrupted .how do I erase my efs partition to rebuild it. I have tired to flash PIT from ODIN but that too doesn't work.
tried this post http://forum.xda-developers.com/showthread.php?t=2567133&page=36
but need a guide to identify the partitions and how to rebuild them. by any chance anyone know if I could extract twrp backup to files to restore efs or from efs.img so I can use the nv_data.bin, since tried restoring the backups and it didn't restore I feel the partition might be corrupt and hence not being re-written. so might be I have to rebuild the partitions by formatting as explained in this thread. but I don't know exactly the steps for exynos variant. I tried using terminal on twrp but mkef2 command shows mmbcblkp03 doesn't exist which as I have read in posts is the efs partition on this phone and reboots to twrp recovery. and mmbcblkp12 show filesystem too small and reboots to twrp recovery

weird thing is, i sometimes find the imei and the baseband and sometimes i dont, phone's not rooted yet, trying to find a way to root it without trippong knox since is not mine, but maybe im able to recover the efs i hope it works

Same problem here...
Hey guys, I'm experiencing the same problem since i installed VN kit kat rom. I searched for the efs backup and i found it but when i use odin to flash it it doesn't work. I tried flashing back to stock but that doesn't work. Can soneone please help me?

Fixed it!!!
If you have a n900 and your imei is null and your baseband is unknown all you have to do is to flash the file beneath with cwm recovery and voila!
You don't have me to thank, DaOldMan/Thomas deserves all the credit!

V-dude said:
If you have a n900 and your imei is null and your baseband is unknown all you have to do is to flash the file beneath with cwm recovery and voila!
You don't have me to thank, DaOldMan/Thomas deserves all the credit!
Click to expand...
Click to collapse
You save my life dude! Thanks alot man!

You're welcome dude! I had the same problem too so i know how you feel
Btw DaOldMan (or Thomas) is the one you need to thank...

V-dude said:
If you have a n900 and your imei is null and your baseband is unknown all you have to do is to flash the file beneath with cwm recovery and voila!
You don't have me to thank, DaOldMan/Thomas deserves all the credit!
Click to expand...
Click to collapse
Thanks Man!!!!This file saved my day!!!cheers!!!!![emoji106] [emoji106] [emoji106] [emoji106] [emoji106]

You're wlecome :good:

V-dude said:
If you have a n900 and your imei is null and your baseband is unknown all you have to do is to flash the file beneath with cwm recovery and voila!
You don't have me to thank, DaOldMan/Thomas deserves all the credit!
Click to expand...
Click to collapse
HI just one question my friend has the exact same problem (IMEI null/null) baseband is unkown !!! the device is SM-N900 running 4.4.2 right now he flashed the file but the problem still exist !!! pleeeeeeeeease help !!
this file only works if the device is running official 4.3 ??? or we can flash it on stock 4.4.2 !!!
it seems wiered to me that others on this forum flashed the file and it worked with them !!!!!
pleeeeeeease help

You can still flash it if you have 4.4.2. The file i uploaded to be flashed is just to flash the baseband not the rom itself.
Btw did you flash the file with cwm recovery?

V-dude said:
You can still flash it if you have 4.4.2. The file i uploaded to be flashed is just to flash the baseband not the rom itself.
Btw did you flash the file with cwm recovery?
Click to expand...
Click to collapse
Thanks man for the reply
anyway !! yes of course we flashed the file with CWM recovery tha recovery that we used is ( n900-cwm-recovery-6.0.4.7-kk(0125) )
we flashed it 2 times but nothing !! after flashing the baseband stays unkown and IMEI (null/null)
just one thing that the system is 4.4.2 rooted is that a problem ? should we flash the official stock 4.4.2 and then flash the file ?!!
we'v tried to wipe factory data/cash partion/ delvic cash then flashed the file still nothing !!
please help my friend is going crazy !!!

V-dude said:
If you have a n900 and your imei is null and your baseband is unknown all you have to do is to flash the file beneath with cwm recovery and voila!
You don't have me to thank, DaOldMan/Thomas deserves all the credit!
Click to expand...
Click to collapse
its work, thanks a lot dude : good::laugh:

ghassano015 said:
Thanks man for the reply
anyway !! yes of course we flashed the file with CWM recovery tha recovery that we used is ( n900-cwm-recovery-6.0.4.7-kk(0125) )
we flashed it 2 times but nothing !! after flashing the baseband stays unkown and IMEI (null/null)
just one thing that the system is 4.4.2 rooted is that a problem ? should we flash the official stock 4.4.2 and then flash the file ?!!
we'v tried to wipe factory data/cash partion/ delvic cash then flashed the file still nothing !!
please help my friend is going crazy !!!
Click to expand...
Click to collapse
That s due to a modem you update so go back to original modem. ..

Ohw ok.... When i flashed the file my sim card got the read the first time i restarted my phone. I don't get why it doesn't work for your friend. What you can try to do is to download (google) other basebands for n900 and try to see if those work (it doesn't necessarily have to be 4.4.2 cuz i flashed the same 4.3 file on my 4.4.2 phone and it worked). If that doesn't work you can try to flash a stock rom and then flash a baseband ( while still in recovery mode), try the one i uploaded. just be sure to have a backup of the current rom if the stock one doesn't seem to be solution.
Maybe start with these :
http://forum.xda-developers.com/showthread.php?t=2475714

[Q] Galaxy note 3 sm-n900 repair imei without efs backup

Hello everybody, I have a galaxy note 3 sm-n900 and I have flashed another rom on my phone ,
but what I have got is null imei and I don't have any backup for efs file
I have tried to flash a stock rom but still have the same problem.
All what I want is a simple way to re-enter my IMEI that I have under my battery into my note 3.

mo.programmer said:
Hello everybody, I have a galaxy note 3 sm-n900 and I have flashed another rom on my phone ,
but what I have got is null imei and I don't have any backup for efs file
I have tried to flash a stock rom but still have the same problem.
All what I want is a simple way to re-enter my IMEI that I have under my battery into my note 3.
Click to expand...
Click to collapse
There is no simple way to enter the IMEI manually.
After flashing stock rom, try to reflash the modem (baseband) 1 or 2 times more.
Does the baseband stick after flashing? Check the Baseband Version with Phone INFO ★Samsung★ app (under FIRMWARE INFO section).

Re-flash stock rom and modem
vndnguyen said:
After flashing stock rom, try to reflash the modem (baseband) 1 or 2 times more.
Does the baseband stick after flashing? Check the Baseband Version
Click to expand...
Click to collapse
I need a way to patch my IMEI .
But if I have to flash stock rom how I can determine which version because I have lost mobile info after this operation,
and how I can reset efs if I want that.

mo.programmer said:
I need a way to patch my IMEI .
But if I have to flash stock rom how I can determine which version because I have lost mobile info after this operation,
and how I can reset efs if I want that.
Click to expand...
Click to collapse
As you can see in the screenshots, your baseband is null so you have to flash the modem or the stock firmware again.
The screenshot shows your original CSC is KSA (Saudi Arabia). Try to download this stock firmware and flash again.
Open Phone INFO ★Samsung★ app > Menu > 'Firmware Browser' > enter KSA into the CSC textbox > tap Go button to search for the firmware.

vndnguyen said:
As you can see in the screenshots, your baseband is null so you have to flash the modem or the stock firmware again.
The screenshot shows your original CSC is KSA (Saudi Arabia). Try to download this stock firmware and flash again.
Open Phone INFO ★Samsung★ app > Menu > 'Firmware Browser' > enter KSA into the CSC textbox > tap Go button to search for the firmware.
Click to expand...
Click to collapse
Actually I have flashed KSA rom on my phone and tried more than one stock rom ,and I have tried to flash five different modem files that I have found on the internet but nothing have changed, and that is the reason why I want a way to batch my IMEI because flashing new stock rom and new modem file have no sense.
Pleeeeeeeease Help I'm in need for solution.

mo.programmer said:
Actually I have flashed KSA rom on my phone and tried more than one stock rom ,and I have tried to flash five different modem files that I have found on the internet but nothing have changed, and that is the reason why I want a way to batch my IMEI because flashing new stock rom and new modem file have no sense.
Pleeeeeeeease Help I'm in need for solution.
Click to expand...
Click to collapse
OK no problem.
The problem now is that your baseband is NULL, so you must reflash a vaild baseband.
Follow this instruction: http://forum.xda-developers.com/galaxy-note-3/general/ref-galaxy-note-3-sm-n9005-gsm-modems-t2842806

vndnguyen said:
OK no problem.
The problem now is that your baseband is NULL, so you must reflash a vaild baseband.
Follow this instruction: http://forum.xda-developers.com/galaxy-note-3/general/ref-galaxy-note-3-sm-n9005-gsm-modems-t2842806
Click to expand...
Click to collapse
It's for sm-n9005. Don't flash that modem on sm-n900.
Sent from my SM-N900 using Tapatalk

mo.programmer said:
Actually I have flashed KSA rom on my phone and tried more than one stock rom ,and I have tried to flash five different modem files that I have found on the internet but nothing have changed, and that is the reason why I want a way to batch my IMEI because flashing new stock rom and new modem file have no sense.
Pleeeeeeeease Help I'm in need for solution.
Click to expand...
Click to collapse
Flash this modem."N900_XXUENE1_MODEM_CWM"
Need a file?pm me.
Sent from my SM-N900 using Tapatalk

meetpatel said:
It's for sm-n9005. Don't flash that modem on sm-n900.
Sent from my SM-N900 using Tapatalk
Click to expand...
Click to collapse
I mean the instruction to flash the modem. The OP should find the proper modem by himself.
Sent from my SM-N9005 using Tapatalk

unfortunately
meetpatel said:
Flash this modem."N900_XXUENE1_MODEM_CWM"
Need a file?pm me.
Sent from my SM-N900 using Tapatalk
Click to expand...
Click to collapse
unfortunately,none of the above solution have worked for me
1. should I flash a specific stock rom for sm-n900 (how I can determine which one because I have lost the original information)
2. should I try to clear EFS with odin ( when try to flash modem).
3. should I try a custom rom that make sense for this kind of problems ( help to choose !!!).
4. should I apply an update a zip file from CWM mode ( which file should I Use)
5. Is there any ADB command that can batch my IMEI.
6. Is it useful to take EFS backup from another note 3 sm-n900 (what I have to do after that).
I feel so lost, I need a help PROFESSIONAL

Tried this? Worked for me.
http://forum.xda-developers.com/showthread.php?t=2507403

Finally got the solution
Dear all thanks for everyone who try to help me
I have got the solution for my problem
1- just try to flash a stock rom for note 3.
2- and then root it.
3- delete the efs folder.
4- reboot the phone.

mo.programmer said:
Dear all thanks for everyone who try to help me
I have got the solution for my problem
1- just try to flash a stock rom for note 3.
2- and then root it.
3- delete the efs folder.
4- reboot the phone.
Click to expand...
Click to collapse
How can you restore the IMEI by deleting the EFS folder?

IMEI
vndnguyen said:
How can you restore the IMEI by deleting the EFS folder?
Click to expand...
Click to collapse
I have not restored it, but I got a new IMEI , now my wireless work, and the baseband appear.

mo.programmer said:
Dear all thanks for everyone who try to help me
I have got the solution for my problem
1- just try to flash a stock rom for note 3.
2- and then root it.
3- delete the efs folder.
4- reboot the phone.
Click to expand...
Click to collapse
How can I delete efs folder ?
can you give a details, thanks

hi everyone my mobile note 3 exynos imei null and baseband unknown how to repair imei can anyone help me.

As per multiple threads restore your backed up EFS folder.
OR Read this thread
Or try flashing stock firmware via Odin .

bro i have flashed two times with odin and flash v4.3 also but not got any solution ,
bro if you know about any tool for repair or restore imei of this device please tell me,
i am trying to repair imei with z3x tool but in this tool not showing n900 exynos model.

Suggest a phone repair shop.
Illegal methods of IMEI fixes etc are not allowed on XDA .

Thanks for your suggestion
but i am a hardware mechanic and i am trying to learn software for better experience THANKS

[Q] Imei Null on i9505 , Help?

Hello everybody i have imei null on my S4 i9505 , and im wondering if anyone has a efs backup for 4.4.2 ?

An EFS backup won't help as the IMEI isn't stored there any longer. IMEI is stored in the partitions used for the modem, so if you attempted an upgrade to 5.0.1 and got the IMEI issue, reinstall the original modem.

Strephon Alkhalikoi said:
An EFS backup won't help as the IMEI isn't stored there any longer. IMEI is stored in the partitions used for the modem, so if you attempted an upgrade to 5.0.1 and got the IMEI issue, reinstall the original modem.
Click to expand...
Click to collapse
so if i flash the modem file for the excact firmware is it possible to get the imei back ?
so now im with latest I9505XXUHOA7_OXAHOA7 firmware
so correct me if im wrong ,now i should flash the I9505XXUHOA7_OXAHOA7 modem file ?

Questions go in Q&A, not General.
Thank you.

UPSS !! said:
so if i flash the modem file for the excact firmware is it possible to get the imei back ?
so now im with latest I9505XXUHOA7_OXAHOA7 firmware
so correct me if im wrong ,now i should flash the I9505XXUHOA7_OXAHOA7 modem file ?
Click to expand...
Click to collapse
Flash the 4.4.2 modem.

[Q] HELP NOTE 3 N900 UNKNOWN BASEBAND, NULL IMEI completely out of Nowhere!

Hello Fellas, am posting here as I haven't found help elsewhere. Kindly Respond to my woes. I have a rooted Galaxy Note 3 N900 running official Lollipop with IMEI Null/Null and No Baseband version. The IMEI just disappeared totally out of the blue as no custom ROM has been flashed on the device!! This has happened 2 months after updating from 4.3 Jelly bean. With no prior EFS Backup here's what I have tried:
1. EFS Professional (backup&restore complete but no luck)
2. EFS Restore express ( backup.bat>Odin restore)
3. GSII Repair tool
After hitting no luck with the above tools and without any "/EFS mount errors" in recovery either and WIFI working fine, I came to a conclusion that most probably the EFS folder partition on my Note 3 is still intact and most probably this could be a case of a bad modem which would explain the loss of Baseband Version and thus the Null IMEI. So I tried flashing back to KitKat with N900XXUENG1 firmware and separately flashed a few modems compatible with Samsung's new EFS System: N900XXUENG1_MODEM, N900_XXUENF2_MODEM_CWM and also gave a shot at recommended N900_XXUENE1_MODEM_CWM.ZIP which seems to restore baseband for many users with this issue but this failed as well. After much searching I found a 4file_N900XXUGBNL8 Lollipop Firmware with PIT from Dev-Host, flashed all files in Odin&even repartitioned the device but still no baseband!!! WIFI&everything else runs smooth except the damn baseband/Null IMEI! Almost Exhausted my options...
Now I trust we have some informed members and developers here, NEED YOUR VALUABLE IDEAS HERE mates! Someone, anyone.....Thanks!

Have got any guarantee of the device?If so,send it to service ıf your guarantee continiues.
If you bought the device from another country,This may occur ıf you didn't register it.(In my country this is how it works.Turkey)
Or someone cloned your imei,check your imei ıf it is valid.
This is not because you upgraded your device to android 5.
If ıt was the case,you would have already faced the problem after just the flash.
I would say flash another modem
But,You say you tried flashing other modems.So no luck with that.
I had seen s3 with the same problem.I had flashed a modded modem.
It worked.I dont know if there is one for your device.
Briefly this is an imei/modem problem.
I don't know ıf the suggestions above help you.
I hope so.
Good luck.

try flashing stock rom from sammobile via odin. you need to backup efs folder everytime you flash a new rom, that's my opinion. may be wrong.

I think I used to had this problem with my Note 2 as well. If you come from 4.3 you should flash stock ROM Jelly bean 4.3 from Sammobile or Samsung-updates website. Then flash lollipop 5.0 over 4.3 when you can see your IMIE. Maybe it will work.

So. If u in L bootloader. U must! Flash the L modem that sometimes didnt get flashed by the odin while flashing stock rom. So just extract the modem.img and things for modem. Then just flash it using dd command or make flashable zip. Then it works fine. I have it on s4 exynos. That if i in L bootloader then even i install kitkat rom with L bootloader. U must still flash the L modem. K. Hope it works

1. İf you couldnt recover with efs professional , probably you've been lost your original imei files like nv_data.bin etc. and there is no backup...
2. So try to remake this kind of files with-again- with efs professional. But there is not so much info about this "creation" process.
3. I had the same situation. . . . And i'm still sorry. . . ( . . . The other solution is JTAG, more easy, cheaper in total and psychologicaly healty !!!)
GOOD LUCK....

m6112 said:
1. İf you couldnt recover with efs professional , probably you've been lost your original imei files like nv_data.bin etc. and there is no backup...
2. So try to remake this kind of files with-again- with efs professional. But there is not so much info about this "creation" process.
3. I had the same situation. . . . And i'm still sorry. . . ( . . . The other solution is JTAG, more easy, cheaper in total and psychologicaly healty !!!)
GOOD LUCK....
Click to expand...
Click to collapse
All EFS folder files are present including nv_data.bak&.bin Am a bit reserved to go the JTAG way just yet.

white7561 said:
So. If u in L bootloader. U must! Flash the L modem that sometimes didnt get flashed by the odin while flashing stock rom. So just extract the modem.img and things for modem. Then just flash it using dd command or make flashable zip. Then it works fine. I have it on s4 exynos. That if i in L bootloader then even i install kitkat rom with L bootloader. U must still flash the L modem. K. Hope it works
Click to expand...
Click to collapse
Thanks for that but as I already said I was lucky to find a 4file partitioned Lollipop ROM with separate modem. Flashed that through Odin and even repartitioned the device but that hit a rock as well!

longcoming said:
Have got any guarantee of the device?If so,send it to service ıf your guarantee continiues.
If you bought the device from another country,This may occur ıf you didn't register it.(In my country this is how it works.Turkey)
Or someone cloned your imei,check your imei ıf it is valid.
This is not because you upgraded your device to android 5.
If ıt was the case,you would have already faced the problem after just the flash.
I would say flash another modem
But,You say you tried flashing other modems.So no luck with that.
I had seen s3 with the same problem.I had flashed a modded modem.
It worked.I dont know if there is one for your device.
Briefly this is an imei/modem problem.
I don't know ıf the suggestions above help you.
I hope so.
Good luck.
Click to expand...
Click to collapse
It's an old device, no warrants. Am indeed looking at the possibility of someone else allocating the IMEI to their device, though i doubt. But if that was the case shouldn't the Baseband at least be present?

Did you try downgrading to 4.3 with official stock files?
If not,give it a shot.

Droidsan said:
It's an old device, no warrants. Am indeed looking at the possibility of someone else allocating the IMEI to their device, though i doubt. But if that was the case shouldn't the Baseband at least be present?
Click to expand...
Click to collapse
I have explained it earlier, Actually it is kernel. Newer kernel makes some changes on EFS partition and that changes can not be read by old kernel but in this case once you flash newer modem it will be solved. If your issue doesn't solved by flashing latest stock ROM then only possibility is messed up EFS partition and for that you must have a backup which was created when your device was normal. If your EFS partition is corrupted and you don't have backup then i think only option you have is to go to service station they can repair it easily. Though your device is not under warranty but you have official bill then still they can do it with paid service. Now a days samsung have changed policy and restoring IMEI they needs to do it online with samsung server (this information I got from service center owner in my city who is my friend and he did same for one of my friend)

UPDATE:
dr.ketan said:
I have explained it earlier, Actually it is kernel. Newer kernel makes some changes on EFS partition and that changes can not be read by old kernel but in this case once you flash newer modem it will be solved. If your issue doesn't solved by flashing latest stock ROM then only possibility is messed up EFS partition and for that you must have a backup which was created when your device was normal. If your EFS partition is corrupted and you don't have backup then i think only option you have is to go to service station they can repair it easily. Though your device is not under warranty but you have official bill then still they can do it with paid service. Now a days samsung have changed policy and restoring IMEI they needs to do it online with samsung server (this information I got from service center owner in my city who is my friend and he did same for one of my friend)
Click to expand...
Click to collapse
Thank you Dr.Ketan for that information. You have been a great help to many. I have followed your posts about this issue and I feel there is still hope.
UPDATE:
I WAS ABLE TO RESTORE THE BASEBAND AND NOW THE IMEI IS GENERIC, READS 004999010640000. [/B] I was able to restore nv_data backup from /Efs folder and deleting bad nv_data. Here's what I did:
Using root Explorer in /EFS:
Deleted corrupt files;
nv_data.bin ( 18 April 2015)
nv_data.bin.md5 (18 April 2015)
Renamed backup files (dated 31 Jan 2015) to apply;
.nv_data.bak > nv_data.bin
.nv_data.bak.md5 > nv_data.bin.md5
Using ADB shell:
Code:
adb shell
su
umount /efs
mke2fs /dev/block/mmcblk0p3
mount -w -t ext4 /dev/block/mmcblk0p3 /efs
Reboot
However, the baseband and generic IMEI come&go across reboots and seems not to stick permanently. Any possible steps from here???

NOTE: Previously I have been able to restore Unknown Baseband and Null IMEI in Galaxy S2 i9100 using the above adb method (Code Only) http://www.selftechgenius.com/?p=284

NOTE: Previously I have been able to restore Unknown Baseband and Null IMEI in Galaxy S2 i9100 using the above adb method (Code Only) http://www.selftechgenius.com/?p=284

Try this out
I always have that problem when I downgrade to jellybean but solving it is easy. Just flash THIS modem file under the AP option Odin. Tell me if it works.

Muthumbi said:
I always have that problem when I downgrade to jellybean but solving it is easy. Just flash THIS modem file under the AP option in odin mode. Tell me if it works.
Click to expand...
Click to collapse
If flashing modem via Odin you MUST turn off the phone then start it in DL mode. Simply doing a 'reboot' into DL mode will not let the modem be flashed.