Hello, I got an EFS issue this occurred after I upgraded the firmware from 4.1.1 to CM10.1, after which I got have an invalid IMEI number as well as an invalid serial number. This has stopped the phone from connecting to nay local networks, I have tried most of the methods suggested here, from using the nv_data.bak to the more extreme methods such as an experimental EFS folder generator, all to no avail. So I was wondering if anyone has any methods that they can suggest to help me out.
I have a CWM and an TWRP backup, but I dont think I backed up the EFS with CWM and when trying to restore with TWRP it gives me an error, when I looked at the backup files it showed the EFS img to be little over 40 bytes to which i came to the conclusion that it was an corrupt backup file.
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I have heard about this EFS and how things get Nasty when IMEI gets corrupt in samsung phones . So Can anybody write a simple steps for me to backing up EFS and restoring it if ever necessary ?
Thank you .
Another thing i have forgot to mention is i am unable to find a Folder called EFS in my / . There is a Folder called Factory which has all ther NV data files.
Hi, my N7105 has lost the capability of reading its IMEI (and even knowing what model it is) after I flashed this: http://forum.xda-developers.com/showthread.php?t=2531965
I have an EFS backup, but it's useless, it seems that I need the param_bin for the N7105, because as I've read, the phone didn't really lost its IMEI, it only can't access it. Please help me!
Solved. Just flashed the via Odin the .bin files that were inside the .tar.gz backup made with EFS Pro, then the IMEI, model number and signal got back. Then EFS Pro was able to recognize my phone and restored the full backup, now even the serial number is restored. Hope this helps anyone who finds himself in a similar situation.
I am in a the same situation, but my efs backup is just a efs.img created by efs_backup_restore_win.
Restoring using it can't bring back my imei.
[Edit] EFS pro keep saying Device not connected. But I already granted the ADB connection in my phone.
Hello,
I looked at other threads regarding the EFS partition but none that really answer my question. I hope it's not a stupid question...
So basically, I was trying out a new ROM and made a backup using TWRP. I inadvertently backed up the data partition separately, but I figured that didn't matter. I then backed up all other partitions (EFS and Modem included) in a separate file. I didn't like the new ROM I tried so I went to restore my backups. When restoring the "everything sans data" backup, I kept getting an md5 error, even though I didn't create an md5 upon backup nor did I ask it to look for an md5 on restoration. I decided to try and restore everything except the EFS, and it worked. Phone is up and running and it doesn't seem like there are any issues. Can someone please explain this to me? I'm assuming the existing EFS partition was never changed, so restoring everything but the EFS should still result in a complete system, but can anyone suggest a reason why it failed when trying to restore EFS with everything else? Thanks!
I have an AT&T S3 which, during some shenanigans I don't remember, was encrypted with a password I could not retrieve. I used Odin to erase the phone's NAND because I had a nandroid backup. This backup, however, was corrupted. I was able to use Odin to flash a stock firmware, but I now only have access to EDGE instead of LTE.
I have restored EFS and NV backups from another AT&T S3 with my IMEI and serial written to them, and my serial and IMEI display correctly in my phone's status window.
I have tried flashing every available modem for the phone.
I have tried numerous APN settings and *#*#INFO*#*# settings.
I have tried damn near every solution to similar problems in this forum.
Any more ideas?
Where did you get your EFS and NV, and how did you restore them?
shortydoggg said:
Where did you get your EFS and NV, and how did you restore them?
Click to expand...
Click to collapse
I used EFS Pro + Qualcomm tools to backup the EFS folder and NV data from a working AT&T S3. Doing this brought back my IMEI, but did not much else otherwise.
EDIT: To clarify, I used the tools to write my specific imei and serial to the backup before restoring that to my phone.
Ok, a lot of these usually don't get fixed, but I'm going to stick to here what worked for some.
First, I'm going to assume that you injected your IMEI correctly. I would next use the EFS Pro to format your EFS from the restore option at the top (then clicking format EFS), since that EFS came from another phone. Your EFS folder will automatically be re-created when you later reboot.
Next, I would download and unzip the attached file. Inject the .txt file with the nv reader /writer. The nv reader writer can be found in this thread.
http://forum.xda-developers.com/showpost.php?p=29514032&postcount=1
Follow steps 1-4, but instead of reading, you're writing the .txt file that you unzipped to your NV. It only contains missing information and should not touch your IMEI. Do not change the dec or hex range.
Reboot the phone and see what happens.
Hello XDA, I am on the process of moving from stock 4.2.2 on my DUOS to a Custom ROM, I haeve my device currently ROOTED, with CWM, SU app, ROM has been backed up using CWM/ROM Manager, Stuff synced with Google, Apps backed up with Titanium, need to be sure I have a recoverable EFS backup.
Now here is where I halted the process because I have been reading quite a lot and talking to people used to flash their phones but none of them have a GT-I9082 and we aren't sure that about what partitions are vital for an EFS restore.
I know I have backed up using EFS Professional my EFS partition but other than that no other partition was available (Used International Variants option as filter, since my device isn't listed by default). I added manually a filter named ftaer my device, the way I made it was reading the PIT file and selecting all the available partitions, but I'm still not sure whether that would suffice to recover a broken EFS.
I would really appreciate any input from people who already recovered their EFS successfully either using EFS Professional or any other method, please tell me which partitions have you backed up.