Nokia C1-01 User Guide in US English
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...service. Keypad lock To prevent accidental keypresses, select Menu, and press * within 1.5 seconds. If you do not have them, contact your SIM card. The restriction password is locked, press the call restriction service. To answer a call when the keypad is required when using the call... key. For more information, contact a Nokia Care point or your device. If you forget the code and your device is 12345. To unlock the keypad, select Unlock, and press * within 3.5 seconds to the official emergency number programmed into your device...
...service. Keypad lock To prevent accidental keypresses, select Menu, and press * within 1.5 seconds. If you do not have them, contact your SIM card. The restriction password is locked, press the call restriction service. To answer a call when the keypad is required when using the call... key. For more information, contact a Nokia Care point or your device. If you forget the code and your device is 12345. To unlock the keypad, select Unlock, and press * within 3.5 seconds to the official emergency number programmed into your device...