Press and hold On/Off until your phone is turned on.
0000
0000
Key in your SIM PIN and press OK. The default SIM PIN is 0000.
If an incorrect SIM PIN is entered three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. Sign in to the O2 website to get the PUK. Please note: If you key in the wrong PUK ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from O2.
