To ROOT
Put Root-i9001-Signed.zip into internal sdcard
Reboot into Recovery mode (see here: http://forum.xda-developers.com/show...5&postcount=19 thanks to RiverSource)
Use Volume buttons to choose apply update from sdcard in Recovery Menu.
Press Home button to submit.
Use Volume buttons to choose Root-i9001-Signed.zip on sdcard
Press Home button to start update.
2 seconds and Root is installed.
Choose reboot system now and press Home button to reboot your phone.
To UNROOT
Put UnRoot-i9001-Signed.zip into internal sdcard
Reboot into Recovery mode
Use Volume buttons to choose apply update from sdcard in Recovery Menu.
Press Home button to submit.
Use Volume buttons to choose UnRoot-i9001-Signed.zip on sdcard
Press Home button to start update.
1 second and Root is gone.
Choose reboot system now and press Home button to reboot your phone.
I can enter the Recover Mode this way:
- Switch phone off
- Press Vol+ and Power Button
- as soon as the "SAMSUNG" appears release both buttons
- as soon as the "Android out of the Box" appears, press the Menu button.
Remark: Don't press the Home Button during power on! Otherwise you will enter the RAM Dump mode.
klik this link to download this file root?