Nokia 8290 - Manual (Page 78)

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Security features
Note: If you enter a wrong PUK code ten times in a row, the SIM card
becomes invalid and you must contact your service provider for a
new card.
5 Enter the new PIN code, then press OK.
6 Enter the new PIN code again to verify, and press OK.
Note: You cannot change the PUK or PUK2 code, so keep a record
of them in a safe place. If you lose them, contact your service
provider.
If you try to change the PIN2 code, and you enter a wrong
PUK2 code ten times in succession, you can’t use functions
requiring the PIN2 code. Contact your service provider for a
new card.
• Security code
You need the security code to access some security features. When the
phone requires the security code, it displays Security code:
• Enter the code then press OK.
If you enter an incorrect security code five times in a row, the phone will
not accept the correct code for 5 minutes.
This code comes with your phone. The default security code is 12345. To
change the security code:
1 Press Menu 4 6 5.
2 Scroll to Change security code and press Select.
3 Enter the current security code, then press OK.
4 Enter the new security code, then press OK.
5 Enter the security code again to verify, then press OK.
Keep the code secret and in a safe place, separate from the phone.