Samsung X640 User Guide - Page 59
PIN check, Change PIN, Phone lock, Change Password, Privacy, SIM lock
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Menu functions Security (Menu 9.4) Use this menu to protect the phone against unauthorised use by managing the several access codes of your phone and SIM card. If you enter an incorrect PIN /PIN 2 three times in succession, the SIM card is blocked. To unblock it you need to enter your PUK/PUK2 (Personal Unblocking Key). The codes are supplied by your network operator. PIN check (Menu 9.4.1) The 4-to 8-digit PIN (Personal Identification Number) protects your SIM card against unauthorised use. When this feature is enabled, the phone requires your PIN each time it is switched on. Change PIN (Menu 9.4.2) Use this menu to change your PIN. The PIN Check feature must be enabled to use this feature. Phone lock (Menu 9.4.3) The Phone lock feature locks the phone from unauthorised use. 56 When this feature is enabled, you must enter a 4- to 8-digit phone password each time the phone is switched on. The password is preset to 00000000. To change the password, use the Change password menu. Change Password (Menu 9.4.4) Use this menu to change your phone password. The password is preset to 00000000. Privacy (Menu 9.4.5) Use this menu to lock your media contents, including MMS messages, voice memos, images, and sounds. 1. Press to check the item(s) to be locked. 2. Press to lock the marked items. 3. Enter the phone password and press . To access a locked item, you need to enter the phone password. SIM lock (Menu 9.4.6) The SIM lock feature allows your phone to work only with the current SIM by assigning a SIM lock code. You