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Press P key to increase the volume in audio/video playing screen.
SPACE Key
In the standby mode, press and hold the SPACE Key for about 3s to
lock/unlock the keypad.
In the text editor screen, press the SPACE Key to insert a space character.
Message Key
In the standby mode, press the Message Key to access the write message
screen directly.
SYM Key
In standby mode, press and hold SYM Key in idle screen to
activate/deactivate the Silent mode.
In the text editor screen, press SYM Key to insert a symbol.
Enter Key
Press the Enter Key to add a new paragraph in the text editor screen.
Del Key
Press the Del key once to delete the last character in the display, long
press it to delete the characters consecutively.