Backup efs folder; important file of Galaxy S & Galaxy S2

To backup efs folder

    You need to gain rooted for your Galaxy S, S2. For me, I use Speedmod kernel to gain rooted.

Use adb command

>adb shell
$su
#busybox tar zcvf /sdcard/efs-backup.tar.gz /efs


After this you will got the efs folder backuped in /sdcard folder