See also:

Telephone keypad
1 Telephone keypad 2 Folding cover ...

Back button
Press briefly:  - Back  - Switches off the Voice Control System  - Hides display messages or calls up the last Trip menu function used  - Exits the telephone bo ...

Back button
Press briefly: - Back - Switches off the Voice Control System - Hides display messages or calls up the last Trip menu function used - Exits the telephone book/redial memory ...