Security code (5 to 10 digits)
The security code protects your phone against unauthorized use. The pre-set code is 12345. Change the code, and keep the new code confidential and in a safe place separate from your phone. If you key in an incorrect security code five times in succession, the phone ignores further entries of the code. Wait for 5 minutes and key in the code again.

PIN and PIN2 codes (4 to 8 digits)
The PIN (Personal Identification Number) code protects your SIM card against unauthorized use. The PIN code is usually supplied with the SIM card. You can set the phone to request the PIN code each time the phone is switched on. The PIN2 code may be supplied with the SIM card and is required to access some functions.

Module PIN and Signing PIN
The module PIN is required to access the information in the security module. The signing PIN is required for the digital signature. The module and signing PIN are 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, for example, and ask you to enter the PUK code.

PUK and PUK2 codes (8 digits)
The PUK (Personal Unblocking Key) or PUK2 code is required to change a blocked PIN code or PIN2 code.