another alternative is to try the following using ADB or Terminal emulator
su
cat /dev/block/stl3 > /sdcard/efs_dev-block-stl3.img (OR)
busybox cat /dev/block/stl3 > /sdcard/efs_dev-block-stl3.img
then using a Linux distro such as ubuntu
Copy efs_dev-block-stl3.img to the computer with ADB
ADB pull /sdcard/efs_dev-block-stl3.img ~/efs_dev-block-stl3.img
sudo mount -r -o loop efs_dev-block-stl3.img ~/efstemp
browse to efstemp
nv_data.bin should be located in this folder
Use ADB to push this file back to the phone
ADB push ~/efstemp/nv_data.bin /sdcard/nv_data.bin
ADB shell
copy nv_data to EFS directory then remove MD5 file
cp /sdcard/nv_data.bin /efs/nv_data.bin
rm -rf /efs/nv_data.bin.md5
(OR)
busybox rm -rf /efs/nv_data.bin.md5
change the permissions on the file
chmod 700 /efs/nv_data.bin
change the owner of the file
busybox chown 1001:1001 /efs/nv_data.bin
or
chown 1001:1001 /efs/nv_data.bin
Most of these details have been taken from the following site
http://www.techofweb.com/technology/backing-efs-folder.html
The phone will be require to be rooted for this to work
su
cat /dev/block/stl3 > /sdcard/efs_dev-block-stl3.img (OR)
busybox cat /dev/block/stl3 > /sdcard/efs_dev-block-stl3.img
then using a Linux distro such as ubuntu
Copy efs_dev-block-stl3.img to the computer with ADB
ADB pull /sdcard/efs_dev-block-stl3.img ~/efs_dev-block-stl3.img
sudo mount -r -o loop efs_dev-block-stl3.img ~/efstemp
browse to efstemp
nv_data.bin should be located in this folder
Use ADB to push this file back to the phone
ADB push ~/efstemp/nv_data.bin /sdcard/nv_data.bin
ADB shell
copy nv_data to EFS directory then remove MD5 file
cp /sdcard/nv_data.bin /efs/nv_data.bin
rm -rf /efs/nv_data.bin.md5
(OR)
busybox rm -rf /efs/nv_data.bin.md5
change the permissions on the file
chmod 700 /efs/nv_data.bin
change the owner of the file
busybox chown 1001:1001 /efs/nv_data.bin
or
chown 1001:1001 /efs/nv_data.bin
Most of these details have been taken from the following site
http://www.techofweb.com/technology/backing-efs-folder.html
The phone will be require to be rooted for this to work