Nokia 2110 - Manual (Page 28)

Getting Started
PUK CODE (at least 8 digits)
The PUK (Personal Unblocking Key) is supplied with the SIM
card.
The code is required when you want to change a disabled
PIN code.
If you enter a wrong code ten times in succession, you can-
not use the SIM card any more. Contact your network opera-
tor for a new card.
You cannot change the PUK code. If you lose the code,
contact your network operator.
PUK2 CODE (at least 8 digits)
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 a wrong code ten times in succession, you will
not be able to access the functions which require the PIN2
code. To utilise these functions, contact your network opera-
tor for a new card.
You cannot change the PUK2 code. If you lose the code,
contact your network operator.
BARRING PASSWORD (4 digits)
The barring password is required by the Call Barring network
service only. You obtain the code from your network operator
when you subscribe to the service.
The password can be changed within Menu 5 6 4.
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