Motorola MOTOROKR E6 Owner's Manual page 133

features
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.
other features—security 131