PUK code (8 digits)
The PUK (Personal Unblocking Key) code is required to change a
blocked PIN code. The PUK code may be supplied with the SIM card.
If not, contact your local service provider for the code.
If you key in an incorrect PUK code ten times in succession, the SIM
card cannot be used anymore. Contact your service provider for a
new card.
You cannot change the PUK code. If you lose the code, contact your
service provider.