Caution: If you enter the wrong code too many times, the phone may become permanently locked. If you see "SIM network PUK," you may need an unfreeze code (MCK). Important Considerations
Do not enter the wrong code more than 5–10 times. Your phone may permanently lock to the original carrier, requiring expensive repair.
1. The "Golden Ticket": Free Network Unlocking via Your Carrier 100% free and official