User guide

PUK: Personal Unblocking Key. This is the number
you get from your network operator and which is
used to unblock your SIM card if an incorrect PIN
has been entered three times in a row.
SIM card: this is the card provided by your network
operator that you need to insert in your GSM terminal
in order to make and receive calls. It contains all the
information from your subscription characteristics.
Definitions 59