2. press Menu then tap BACK
3. press the Menu again the tap KEY INPUT then enter 1, (wait a few seconds) it auto jumped into service menu.
4. press Menu then tap BACK (not needed for me)
Your are now in the SERVICE MODE MAIN MENU
Tap [1]UMTS (may auto go into next menu (mine did)
then [1]DEBUG SCREEN
then [6]PHONE CONTROL
then [6]NETWORK LOCK
then tap [3]PERSO SHA256 OFF
Go back to the UMTS MAIN MENU by pressing Menu then Back (several times)
then tap [6]COMMON
then [6]NV REBUILD (if this does not work next time)
do [4]RESTORE BACK UP
the device will freeze, black screen, Blue LED Light, Menu and Back key ON. Wait for it to reboot (about a minute).
Your Samsung Galaxy I9505 is now Sim-Unlocked
...:::ZAKIR GSM:::...