Motorola A1200 - Manual (Page 133)

131 other features—security
unblock SIM card PIN codes
If you enter an incorrect SIM card PIN code
or PIN2 code three times in a row, your SIM
card is disabled and your phone shows
SIM PIN Blocked. You must enter a PIN
unblocking key (PUK) code, which you can
obtain from your service provider.
Caution: If the unblocking attempt is tried
unsuccessfully 10 times, the SIM card is
permanently disabled and your phone
shows SIM Disabled.
features