See also:

Deleting all stored programs
Press both outer memory buttons 1 for approx. 20 seconds until the LED flashes rapidly. All stored programs are deleted. The programs cannot be deleted individually. ...

Entering a phone number
Dialing a number 1. "Telephone" 2. "Dial number" 3. Select the digits individually. 4. Select the symbol. The phone number can also be entered by voice. ...

Controls
Almost all functions can be operated in the same manner as they are in the front. Special features of operating the system in the rear are described here. ...