Nokia 6820 User Guide - Page 22
PUK and PUK2 codes (8 digits), Barring password (4 digits), Wallet code (4 to 10 digits)
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• The signing PIN is required for the digital signature. See Digital signature on page 165. The signing PIN is supplied with the SIM card if the SIM card has a security module in it. If you key in an incorrect PIN code three times in succession, the phone may display PIN blocked or PIN code blocked and ask you to key in 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 network operator or service provider. Barring password (4 digits) The barring password is required when using the Call barring service, see Security settings on page 127. 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 several times, the wallet application is blocked for five minutes. For further information, see Wallet on page 139. Copyright © 2004 Nokia. All rights reserved. 22