In the case you forgot a PIN to access your SIM card, if you enter the wrong PIN too many times, your SIM card will become PUK-locked. In this case, you need a PUK code to restore access to the phone.
This PUK code may have been provided by your mobile provider when you bought your SIM card.
(If you can not find the PUK code, please contact to your Provider.)
If you have PUK code ready, do the following:
1. On the phone dialer screen, enter the PUK code.
2. Next tap on Next.
3. Enter your new PIN.
4. Then click Next.
5. Pre-inter your new PIN.
6. Finally tap on Next.
Did you like this tip?
Now this time make sure you write down the PIN and store it in a secure place.