Con này unlock = code được mà bạn
1. ENTER on the keypad *2767*3855# (wait 10-15 seconds) phone will reboot(restart)
2. When phone completes reboot ENTER *7465625*638*00000000*00000000# (should enable network lock)
3. NEXT ENTER #7465625*638*00000000# (should disable network lock)
4. AND THEN *#7465625# to check the locks (all locks should be off or are inactive...)