Hi asking if any one have tried or could try this tool in our tab 2 devices this is a PC app to save and backup efs folder which contain the mac address and imei info of our tablets in case it is corrupted by flashing custom rooms so we could restore it again so we will be assured that our radio functions will not be corrupted it do not change anything in the system as I know it only take backups of efs folder
http://forum.xda-developers.com/showthread.php?t=1308546
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Hi I have a samsung gio and I want to make a efs backup but I've got an issue , in the efs professional I can't find my device.
It's there a way to use efs professional if my device isn't listed ? OR How can i make an efs backup without EFS pro ?
Hi I've got a problem.
Times ago i updated to another rom and i missed the efs folder.
I can't flash anything without a efs folder.
i tryed to follow guides on internet to make a efs folder via adb, but without success.
Can some share to me a EFS s7 IMG file, to flash it via Heimdall or Odin?
No, you can't share EFS images, they contain the phones unique IMEI, radios and so forth
Try flashing stock, but if you not backed up EFS and wiped everything, you might need to take it for repair
Hello peopleI am new to the S7 devs, since I've been browsing in the XDA S7 forum I've noticed a lot of people that lost their IMEI or corrupted it during installing custom ROMS.
It feels so bad even to imagine it, I was wondering if there is someone who can explain what makes a ROM corrupt IMEI or the EFS partition, and why some ROMS does the damage to people and not for others?
And whether having an EFS backup can save you in all cases or there are some cases where you really have no hope even with a full phone backup (all partition included)?
I am a big fan of custom ROMS but unfortunately, I can't afford to lose that phone at the moment.
So I was hoping that someone will shine some knowledge by answering what I asked and also provide some advice to do in the future to avoid as much as possible to end up with a Bricked phone or a useless one without IMEI.
Thank you very much in advance and don't be lazy on typing some lines that might help some people even if it's not me at the moment
From KingoRoot
What is EFS?
The EFS refers to a folder called EFS which can store information like meid, imei, serial number, config, diag settings and radio settings, etc in an encrypted format at the file system level stores. So it is very neccessary for us to backup EFS before flashing ROMs.
How will you lose the EFS folder?
How will you lose the EFS folder?
As far as I known, you always lose your EFS by mistaken operations. For example, flash ROMs or wipe data using an uncorrect method. Even wrong power on & off ways like taking out the battery to force shutdown as starting could corrupt your EFS, too. Rooting and flashing ROMs usually have no influence on EFS data, but you know everything can happen in the real word. There are some ways you can check whether your EFS folder is lost: inputting *#06# on dialler, going to settings/about phone/status or checking mac address.
What results if you lose the EFS folder?
The loss of the EFS folder may bring about an incredible disaster on your device such as no imei information, base band unknown, no radios and so on which mean your device will no longer be recognized by your carrier. After knowing that, won't you back up the folder?
How to back up the EFS folder?
Bofore backing up the EFS folder you need make sure your Andriod device is rooted. Then, install Custom Recovery on your device. Open the Custom Recovery, select the Backup option, and go on select the paritions containing EFS, then "Swipe to Back Up" to begin the backup process.
There are as well two Apps from wanan to backup your EFS one is EFS Backup and the other Partitions Backup
Always remember before playing with your phone, to read a lot, and always do BACKUPS
When we are on stock OOS (before unlocking the bootloader also) with no root or any modifications. Then the EFS partition is completely untouched.
Whenever we are flashing anything a mod a rom or whatever some zips can damage the efs partition. Even though it has only happened to me on a Samsung device before never in a OP device. I'm still wondering if after we have flashed things is the Efs partition still untouched?
So if I made a backup of it after flashing a ROM is it the exact same EFS as when I was on STOCK OOS?
The EFS contains the modem and IMEI, the backup will be the same as long as you haven't modified the EFS.
JonesL said:
The EFS contains the modem and IMEI, the backup will be the same as long as you haven't modified the EFS.
Click to expand...
Click to collapse
Okey thanks The EFS and modem partitions have different very sizes. So the efs can't contain the modem or am I wrong? There is Bluetooth, dsp and modem files inside the modem backup folder and only efs files in efs backup folder.
I lost the funcionality Phone in my N8000. I think i lost the imei e someone more else. How can i restore my efs? I have a backup of my efs in format zip and format tar made 5 years ago ( i dont remember what application i used) , but i can not install via Odin or via Twrp, said Invalid Zip format on checking Digest File. I think the problem is checking the md5 generation that is not compatible with Odin and Twrp.
Someone can help me to restore the /efs partition with old backup. Thanks
see your identical post .
I resolved this situation, using Solid Explorer and Qute Terminal with root.
Credits
http://androidadvices.com/restore-imei-efs-folder-galaxy-s3-details/
Thanks
It is not solved, when reboot the system, the imei of phone, N8000 is another, is from another file from i used to recover.
Manually from my backup what files and permissions i have to copy to the /efs in root of my N8000? First i copy nv_data.bin, nv_data.bin.md5 and the folder /imei and works. I do not known the original permissions of the files, perhaps now the problem is this.
Someone can help me?
Thanks
With this guide "[GUIDE] Recover your IMEI in 9 steps. " https://forum.xda-developers.com/galaxy-s2/general/guide-recover-imei-9-steps-t1264021 , i resolved my problem with imei, no problems with reboot, but now i did not have access to Wifi, i can not connect to my Wifi Network.
Someone can help me, how can activate wifi? What files i need to copy from my backup? Before clean the /efs i made a backup the old efs.
Thanks
Flash stock rom .
I flash the stock rom and now i did not have any problems