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[HEAD]Other Infos[/HEAD]

This Tool is for Backing up the /efs folder!

In the EFS Folder your IMEI and other very important Files are stored!

It's a MUST to back it up!

A corrupt ROM or Script could change this Folder, like we have seen at Nexus Sense or TWRP !

adn I don't want to say something bad about the Nexus Sense Dev! He is a very good Dev and I only want to bring a example for this Tool!


Make sure you have USB Debugging ON!

To back it up run efs_backup.bat /

to restore it run efs_restore.bat /

Actual Versions
EFS Tool 2.1 [bug fix, use this version!] for Linux/Mac

EFS Tool 2.0 for Windows

[HIDE=Pre- Versions]
2.0 Version
EFS Tool 2.0 for Windows

EFS Tool 2.0 for Linux/Mac

1.0 Version
EFS Tool for Windows

EFS Tool for Linux/Mac
2.1 10/8/2011
- Linux Version fixed!

2.0 4/8/2011
- Script optimzed
- "wait for device" included
- BUG fixes (hopefully)

1.0 24/6/2011
- Release!

Cyanogemod for the Disclaimer
Linus Torvalds for the Linux Kernel

* Your warranty is now void.
* I am not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired because the alarm app failed. Please
* do some research if you have any concerns about features included in this TOOL
* before flashing it! YOU are choosing to make these modifications, and if
* you point the finger at me for messing up your device, I will laugh at you.

10 Posts
Discussion Starter · #3 ·
dino1342 said:
i see EFS everywhere and i dont know what it mean can someone break it down for me
EFS is a direction in the root of your nand, /efs !

in this direction are some very important files stored! these files contain the IMEI and other important information! this is the main thing!

the problem is when a updater-script is written false the this can cause the problem that the updater-script deletes/formats the /efs and your IMEI is gone!
and the only one that can restore your IMEI is Samsung so you have to send it to Samsung or you will get blacklisted by your provider, because you use a generic IMEI !

hope this helps
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