Nokia 9290 - Manual (Page 324)

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Glossary
PUK (PIN Unblocking Key) code
The PUK is an 8-digit code supplied with the SIM card. The code is required
when you want to change a disabled PIN code. If you enter an incorrect PUK
code ten times in succession, the SIM card is rejected and you cannot make
or receive any calls, except emergency calls. When the SIM is rejected, you
will need a new SIM card. You cannot change the PUK code. If you lose the
code, contact your system service provider.
PUK2 Code
The PUK2 code is supplied with some SIM cards. The code is required when
you want to change a disabled PIN2 code. If you enter an incorrect PUK2
code ten times in succession, you will not be able to access the functions
which require the PIN2 code. To use these functions again, you will need to
obtain a new SIM card from your system service provider.You cannot change
the PUK2 code.
Restriction password
The restriction password is a 4-digit code needed to change fax and voice
call restrictions, see ‘Restrict voice calls’ on page 106. The password is not
located in your communicator or SIM card, but in the network. You obtain
the password from your system service provider when you subscribe to the
call restriction service.
Roaming agreement
An agreement between two or more system service providers to enable the
users of one service provider to use the services of other service providers.