Default How to make stl4 backup in gt-i5500?
HI

I want to make a backup for the amms, and according to the ops file for the phone it sould be in the stl4 (fourth position). Im doing it with the adb
Code:
adb shell
su
if dd=/dev/stl4 of=/sdcard/amms
and getting this error
stl4/dev: Cannot open for read: Invalid argument

and the same for /dev/block/stl4

The phone is rooted with universal androot, i gave the permission for the su command.

Someone knows how can i fix this?? Thanks