PIN and PUK
The personal identification number (PIN) protects your SIM card from unauthorized use. The PIN unblocking key (PUK) is used to unlock the blocked PIN. Both the PIN and the PUK are provided with the SIM card. For details, contact your service provider.
If you enter wrong PINs thrice consecutively, the phone prompts you to enter the PUK.
If you enter wrong PUKs ten times consecutively, the SIM card becomes permanently invalid. In this case, contact your service provider for a new SIM card.
Locking the Screen and the Keypad
To set the phone to automatically lock the screen and the keypad when the phone is in standby mode for a specific period, select Menu > Settings > Security setup > Auto keypad lock, and then on the Auto keypad lock screen, select a period (5 sec, 10 sec, 15 sec, or 30 sec).
To unlock the screen and the keypad, press any key on the phone,
tap and hold 
on the screen, and then drag it rightward.
Entertainment
zCamera: to take pictures.
zAudio player: to play the audio files stored on the phone or the microSD card.
zVideo player: to play the video files stored on the phone or the microSD card.
zSound recorder: to record audio files.
zVideo recorder: to record video files.
zFM radio: to receive and play radio programs.
zSchedule FM record: to record radio programs in a preset period.
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