Mute: Open or close mute (C card does not provide this function).
DTMF: Open or close DTMF (C card does not provide this function).
Turn up tone
You can adjust volume through the side key.
4.4 Text edit
You can enter letters, symbols and numbers through keyboard of your cell phone.
The phone provides Smart ABC/abc/FR/fr/AR/ar, Multi
Number input modes. P
ress [#] key to switch.
Press [*] to enter symbol selection mode
4.5 Number input mode
Use keyboard to enter numbers.
4.6 Smart input mode
A key represents several letters. When it is pressed, Smart input mode will
automatically make a correct choice.
Press [OK] to confirm the input word.
4.7 Multi input mode
Press once to enter the first letter and press twice to enter the second letter.