Database Users

[Q] How to restore EFS from nandroid backup?

Playing around with ROMs poses a risk and obviously I screwed up this time. So I restored from a full nandroid backup that I did yesterday, only to find that I have no IMEI and network connectivity is screwed up.
I also have an older full nandroid backup from January this year where I know that network works fine.
I restored the efs partition by reformatting it and populating it with the data from the old backup.
Yet, nothing has changed.
I can get some basic network connectivity back by using Pimp my ROM's option to access hidden menu by turning of the radio, changing the network type and turining on the radio again. But it's only Edge connectivity and the IMEI ist still 0 and adb logcat shows a lot off errors due to an unrecognized device.
Any ideas?

Did you try flash the latest modem?
In s3 there was once a major update of modem/efs. New efs with older modem will screw it up.
I don't know if it's same case in s4 as I have only moved into for very short time.

[Q] recently unlocked S5 can't register to any networks

Hello, I've had my s5 for a while on a Vodafone contract with no problems. The phone was rooted and had a custom recovery. I recently got it unlocked from a local shop due to moving contracts and now since then the phone will not connect to a single network. I have tried 3 different sims from different networks and all the same result. I flashed to stock again and no help. My device status reads:
Network: unknown
Mobile Network type: unknown
Service state: out of service
Mobile network state: disconnected
Phone number and IMEI are correct.
Dialling *#06* shows my correct IMEI. I can't get into any service menus due to no root now, and my EFS folder appears empty
Any help will be useful, thank you

Was root broken by the unlock? A SIM unlock shouldn't break root. First try wiping your system cache from recovery mode. If the problem persists, then your best bet would be to restore your backup which will certainly resolve your issue and let you proceed from a stable position. If you don't have a backup, what the hell? Why wouldn't you be making backups?
As (a much less desirable) alternative, make a backup at this point or at least save any important files or photos. Then temporarily install a 100% stock ROM followed by a factory data reset. This is to rule out software issues other than EFS. If your phone now works, then it was a matter of a broken root or conflicting settings.
If you still have problems, then you need to provide a lot more information if you want good advice. We can't see your handset so if you don't give us a lot of details all anyone can do is flail around in the dark and make guesses. Try your SIM card in another unlocked phone to confirm that it still works. Confirm that you wiped your system cache and tried a factory data reset. And tell us step by step what you've tried so far.
.

fffft said:
Was root broken by the unlock? A SIM unlock shouldn't break root. First try wiping your system cache from recovery mode. If the problem persists, then your best bet would be to restore your backup which will certainly resolve your issue and let you proceed from a stable position. If you don't have a backup, what the hell? Why wouldn't you be making backups?
As (a much less desirable) alternative, make a backup at this point or at least save any important files or photos. Then temporarily install a 100% stock ROM followed by a factory data reset. This is to rule out software issues other than EFS. If your phone now works, then it was a matter of a broken root or conflicting settings.
If you still have problems, then you need to provide a lot more information if you want good advice. We can't see your handset so if you don't give us a lot of details all anyone can do is flail around in the dark and make guesses. Try your SIM card in another unlocked phone to confirm that it still works. Confirm that you wiped your system cache and tried a factory data reset. And tell us step by step what you've tried so far.
.
Click to expand...
Click to collapse
Thanks for the reply, I will describe as best I can what is happening:
Firstly as the phone rebooted from the unlock I could not register to any networks. Root was still there and TWRP also . I restarted the device, and nothing happened. So next I tried a different aim and still I have no network. Both aims work in another phone. I did what you mentioned next and restored a backup and still no fix.
I tried factory resetting and wiping the cache and again, no fix. Then I flashed the stock firmware through ODIN which had no effect either.
If I use the sim in another handset then return to my s5 with it on first boot up it registers to EE and pulls a signal with no Internet, then quickly unregisters to emergency calls only.
Thank you for your help, I will give any info about the device that you need.

fffft said:
Was root broken by the unlock? A SIM unlock shouldn't break root. First try wiping your system cache from recovery mode. If the problem persists, then your best bet would be to restore your backup which will certainly resolve your issue and let you proceed from a stable position. If you don't have a backup, what the hell? Why wouldn't you be making backups?
As (a much less desirable) alternative, make a backup at this point or at least save any important files or photos. Then temporarily install a 100% stock ROM followed by a factory data reset. This is to rule out software issues other than EFS. If your phone now works, then it was a matter of a broken root or conflicting settings.
If you still have problems, then you need to provide a lot more information if you want good advice. We can't see your handset so if you don't give us a lot of details all anyone can do is flail around in the dark and make guesses. Try your SIM card in another unlocked phone to confirm that it still works. Confirm that you wiped your system cache and tried a factory data reset. And tell us step by step what you've tried so far.
.
Click to expand...
Click to collapse
Thanks for the reply, I will describe as best I can what is happening:
Firstly as the phone rebooted from the unlock I could not register to any networks. Root was still there and TWRP also . I restarted the device, and nothing happened. So next I tried a different aim and still I have no network. Both aims work in another phone. I did what you mentioned next and restored a backup and still no fix.
I tried factory resetting and wiping the cache and again, no fix. Then I flashed the stock firmware through ODIN which had no effect either.
If I use the sim in another handset then return to my s5 with it on first boot up it registers to EE and pulls a signal with no Internet, then quickly unregisters to emergency calls only.
Thank you for your help, I will give any info about the device that you need.

[Q] Back from repair, IMEI restored, but empty efs and wifi reboots the phone?

I lost efs together with imei last week when I tried to flash a different modem. Running out of options I sent the phone to a repairer.
Today, after one week, I picked it up from them and they somehow got the imei back and the phone is working while I was still at their office.
Now I'm home and tried to connect it to my home's wifi, as soon as it connects, the phone reboots. It's very stable on mobile data though.
I cleared data, flashed different roms, but wifi connection always reboots it.
Then I looked in the efs folder and surprise, it's empty!!! I don't know whether that's the cause of the wifi problem, but isn't it odd that the phone runs ok otherwise without efs?
Anybody has any idea of what's happening to my phone? Can my wifi problem be fixed?

I do actually have an efs backup that I've done back in January. But I just can't remember what tool I used to make that file. The file name is "efs.img". Any suggestion at all?

ioneng said:
I do actually have an efs backup that I've done back in January. But I just can't remember what tool I used to make that file. The file name is "efs.img". Any suggestion at all?
Click to expand...
Click to collapse
Use IMEI Tool N9005 Free 1.1

[Q] EFS / IMEI / Network Issues, unable to find an answer

Long story short, a week ago I tried to encrypt a new rom and the rom did not show the encryption process, and after 3 hours I thought something went wrong and rebooted it. This is where the problems started. I obviously corrupted my EFS.
I tried installing stock firmware from sammobile, several different versions, and none worked. I looked through dozens and dozens of threads on here, and other sites, and found various solutions for EFS problems but everything entailed making a copy of the EFS and restoring it. Before I found these, I tried something else (I can't remember what), and apparently destroyed my EFS and was stuck at bootloader. After a lot of research I found a thread on here, for recreating the EFS partition, which allowed me to boot my phone into Android again, except it is stuck in factory mode. Network was still not working, IMEI was still wrong. After flashing a new modem, my phone detected my simcard, shows network detected, I can choose my APN and network, but network is still not working. No data, no sms, no calls. I've flashed several different stock firmwares again, and phone is still in factory mode, and IMEI is still on 0049. Factory reset and everything, wiped cache, flashed latest TWRP. I installed root browser, and it is showing the necessary files and folders in the EFS folder. Oh, and knox has been tripped, so no official firmware upgrade through Kies.
Before someone suggests sending phone in for repairs, or giving up hope, the fact that flashing the modem has gotten the phone to recognise the simcard and my carrier details, that must mean that there is some solution. Question is, what is the solution? I have gone through more threads than I can count with regards to EFS corruption and such, and I have searched for a solution to the problem but I have not found anything yet. There are no original EFS backups on my phone, and the only equipment I have are my laptop, Odin, and the internet. There aren't any service centres nearby either, which means my phone would need to be sent in for repairs, which can take anything from a week to a month. Does anyone have an idea on how to solve this problem? I can't imagine that I am doomed, considering the progress I have made.

Well, your main problem is this: The IMEI is NOT in the EFS folder, because the nv_data.bin file that used to be located in that folder was moved to a hidden partition on the device at some point during the lifetime of the S4. So even if you backed up the EFS folder you'd still be out of luck. A more comprehensive tool like Wanam's EFS Backup tool would have helped, since it not only does a backup of the EFS folder but the hidden partitions where the modem, its backup, and several other crucial pieces of information are stored, including the IMEI.
That said, there may still be hope for you. Attempt to flash your ROM through Odin, but also use a PIT file for your device, which can be found on the forums. It will recreate your partitions, and in doing so may resurrect your IMEI. However, if that does not work, you will have no choice but to send the device in for service.

samsung s7 edge lost imei info?

hi all
my partners s7 edge was running very slow so i flashed the stock firmware yesterday and now its lost IMEI information. i have followed guide on here and tried all 3 steps (reflashing rom etc) however whenever i try backing up EMS it fails saying there is no EMS file, she cannot make any calls as its not registering on the network. please can someone help with this???

rumel2011 said:
hi all
my partners s7 edge was running very slow so i flashed the stock firmware yesterday and now its lost IMEI information. i have followed guide on here and tried all 3 steps (reflashing rom etc) however whenever i try backing up EMS it fails saying there is no EMS file, she cannot make any calls as its not registering on the network. please can someone help with this???
Click to expand...
Click to collapse
Hey, I have the same problem, I guess that there's not solution yet.

Try here:
https://forum.xda-developers.com/showthread.php?t=3379516
Sent from my SM-G935F using Tapatalk

Do you a have a efs.img backup ? Or any kind of IMEI/EFS/RADIO backup ?
I had the same problem I flashed the stock ROM and somehow I lost my IMEI info, I tried everything and I was even thinking about buying a z3x box but then I decided to do a very risky move , I completely deleted all the EFS related files/info and reflashed again but now I was not able to boot because I always sent me to recovery mode saying that :
"E:Failed To Mount /EFS (invalid argument )"
Then all I did was installing TWRP and rooted my SM-G935F and then I placed my efs.img backup on my internal SD CARD and went on recovery launched the terminal and wrote this :
dd if=/sdcard/efs.img of=/dev/block/platform/155a0000.ufs/by-name/EFS
Then I wrote reboot and it finally my phone was booting and I recovered my IMEI and was able to use my phone normally.
This only works if you have a backup of your EFS, and even if you do is risky , but I did it because I lost all hope and was accepting the fact that my phone would just become a useless wifi only device .

So there is not a fix yet for this problem ?

I have a problem on my s7edge instead. If i have valid imei i'am almost always in emergency calls, and when the signal comes back does not go into mobile data connection. With the wi fi no problem.Can someone help me i'am going crazy.!

IMEI, Network Signal and Baseband is misssing
Re: IMEI, Network Signal and Baseband is misssing
IMEI, Network Signal and Baseband is misssing
Hi
I am ready to donate if any expert can help me to restore IMEI.
I am using SM-N9500 samsung note 8 model - hongkong version, i frequently change the roms.. when last time i tried to install a custom rom i lost IMEI. i am getting error like IMEI-unknown, baseband- unknown, no network and sim cards not working..
i tried installing stock rom, custom roms, it was installing successfully but only baseband, signal and IMEI are not working. i didnt even back up my EFS folder. So, kindly help me to get back my IMEI.
I have installed stock rom, still no IMEI. now i rooted my mobile and taken EFS backup. is it enough? if yes, pls suggest me the next steps. I also tried installing combination firmware, though is not working, installation was successful and also i am able to see the factory binary logo, after which it will switch off automatically and boot loops. everytime it will open factory binary and immediately it will switch off automatically..
Build number - R16NW.N9500ZHS4CRJ1