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PUK code
The Personal Unblocking Key (PUK) 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
lose the code, contact your service provider.
PUK2 code
The PUK2 code, supplied with some SIM cards, is required to change a blocked PIN2 code. If you
lose the code, contact your service provider.
Security code
The security code can be used to avoid unauthorized use of your Nokia 31 terminal. The factory
setting for the security code is 12345. You can change the security code using the Nokia 31
Configurator software. Keep the new code secret and in a safe place.
Call Barring password
The barring password is needed when using the Call Barring function. You must contact your
service provider to get this password.
ENTER THE PIN CODE
The PIN code, issued by the SIM card provider, protects the SIM card against unauthorized use. If
the SIM card requires a PIN code, you must enter this code before you can use the Nokia 31
terminal.
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