[GUIDE] Galaxy S4 Sim-Unlocking

Tested only on Samsung Galaxy I9505

Instructions:

1. Dial *#0011#


2. press Menu then tap BACK


3. press the Menu again the tap KEY INPUT then enter 1, press OK button

4. press Menu then tap BACK

Your are now in the SERVICE MODE MAIN MENU


Tap [1]UMTS


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 then tap [6]COMMON


then [6]NV REBUILD


then tap [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.






Credits:
royskeyz
djembey
artnada

http://forum.xda-developers.com/showthread.php?t=2282683