18Copyright © 2005 Nokia. All rights reserved.
If you key in an incorrect PIN code three times in succession, the phone may 
display PIN blocked or PIN code blocked, for example, and ask you to enter the PUK 
code.
PUK and PUK2 codes (8 digits)
The PUK (Personal Unblocking Key) code is required to change a blocked PIN code. 
The PUK2 code is required to change a blocked PIN2 code.
If the codes are not supplied with the SIM card, contact your local service provider 
for the codes.
Barring password (4 digits)
The barring password is required when using the Call barring service, see Security 
settings on page 123. You can obtain the password from your service provider.
Wallet code (4 to 10 digits)
The wallet code is required to access the wallet services. If you key in an incorrect 
wallet code three times in succession, the wallet application is blocked for 5 
minutes. The next three incorrect entries of the code will double the time. For 
further information, see Wallet on page 145.
■ Network services
To use the phone you must have service from a wireless service provider. Many of 
the features in this device depend on features in the wireless network to function.