Database Info

[Q] /EFS Folder

I just came from the SGS4G and had no problem finding this...but i was wondering if anyone could tell me where to find the /EFS folder on the g2x so that i can back it up. ive had bad experiences not backing up this folder (ex. imei being wiped and phone not finding service, had to send it back to be replaced)

EFS Folder is only for Samsung devices, I believe.

ok thanks for reply, but if this is so where is the folder containing important imei data?

jdubb1106 said:
ok thanks for reply, but if this is so where is the folder containing important imei data?
Click to expand...
Click to collapse
The IMEI is hardcoded into the chip, or so I was informed.

Imei, sim lock state etc is stored on a hidden partition. Not accessable even with nvflash.

tahahawa said:
Imei, sim lock state etc is stored on a hidden partition. Not accessable even with nvflash.
Click to expand...
Click to collapse
so pretty much **** out of luck on backing those files up?

jdubb1106 said:
so pretty much **** out of luck on backing those files up?
Click to expand...
Click to collapse
unless you own a jtag box and know where the pin outs are or have something similar, then pretty much.

ok thanks for the reply guys

[SOLVED]/efs corrupted...please help experts!!!!!!

I am with froyo rom (purumod) and with fugumod 800Mhz std edition.
using fs.convert, converted system,data,cache to ext2 and sdext to ext4. Everything was fine here. Phone was very smooth and fast.
(I don't know why I did ) it but I was playing with shell, saw in output of 'mount' command that some /dev/stl4 (-> /efs) is in rfs filesystem. I thought lets convert it to ext2....created fs.convert with content "stl4 ext2". reboot phone. It did turned on as normal but NO NETWORK. Then I searched xda and found that I made a big mistake....a CORRUPT EFS ......
saw this thread for
G3 http://forum.xda-developers.com/showthread.php?t=887769
but no luck....
can anyone point me to some direction...how to restore my phone?
I tried reflashing entire rom but i guess it dose not touches /efs....so no luck.
Please help me devs....
Edit:
I solved this. Please see my 4th post.
(i know int wrong thread, but i hope all devs watching this thread can help me. MOD can move this thread)

Was able to solve the problem of mounting efs using this thread -
http://forum.xda-developers.com/showthread.php?t=888193&page=3
Now I have /efs mounted but IMEI as 0000000000000000. trying to solve this....

bsuhas said:
Was able to solve the problem of mounting efs using this thread -
http://forum.xda-developers.com/showthread.php?t=888193&page=3
Now I have /efs mounted but IMEI as 0000000000000000. trying to solve this....
Click to expand...
Click to collapse
I should have put something in fugumod to avoid users to convert stl4 :/
If you don't have any backup of your original files of your efs partition (nv_data.bin etc..) , it will be very hard to restore your IMEI.
if you flash something on your phone, DO a backup of your efs partition (image and files).

marcellusbe said:
I should have put something in fugumod to avoid users to convert stl4 :/
If you don't have any backup of your original files of your efs partition (nv_data.bin etc..) , it will be very hard to restore your IMEI.
if you flash something on your phone, DO a backup of your efs partition (image and files).
Click to expand...
Click to collapse
So there is no way to restore IMEI if I dont have a backup efs??

FINALLY I WAS ABLE TO RESTORE MY EFS AND IMEI TOO...
Thanks to Szaby59 fro this http://forum.xda-developers.com/showthread.php?t=887769
which helped me restore /efs partition
and Much thanks to QPST and Peoplearmy for forum.xda-developers.com/showthread.php?p=29462530#post29462530
which helped me restore IMEI....phone is back to life now.

bsuhas said:
FINALLY I WAS ABLE TO RESTORE MY EFS AND IMEI TOO...
Thanks to Szaby59 fro this http://forum.xda-developers.com/showthread.php?t=887769
which helped me restore /efs partition
and Much thanks to QPST and Peoplearmy for forum.xda-developers.com/showthread.php?p=29462530#post29462530
which helped me restore IMEI....phone is back to life now.
Click to expand...
Click to collapse
How did you do it brother? I tried everything still no luck.

[Q] EFS backup

Hello, i performed an EFS folder backup using EFS Professional. My question is, why it needs Busybox to work? I must have Busybox installed if i need to restore the EFS folder? I'm on 4.2 stock and rooted.
PS: the backup went ok, no errors. There is anothe better way to backup EFS on gt-i9105P?
PS2: Restoring a nandroid backup, also restore the EFS folder?

there is very little chance that your efs folder will be blown up .. now that you have a backup , you need not need to worry .. while flashing roms and wiping dat , and restoring roms via cwm backup and restore you only need to restore the rom and not the efs folder backup .. if in case , you do not find your imei no. or your efs folder and stuff , you can at any given time restore it manually .. correct me if i am wrong but that is how it works . all the best and Happy Flashing

EFS Backup Help

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 ?

IMEI lost or corrupted

Hello people​I 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