See also:

What to do if...
Only a black screen is visible. Switch on the system. There are no options available on the screen. Switch over between the display screens. Radio stations or TV channels are grayed out ...

Switching off
Press the button repeatedly until the LEDs go out. ...

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