Telephone

Functions

• Why does no call screen appear on Android devices?
• How do I change the ringtone?
• I don't want to be disturbed by phone calls, what should I do?
• How do I block a number?
• Why does receiving and making calls via landline not work?
• How can I copy my smartphone contacts to the Internet-Box?

Connection

• I don't get any notifications on an incoming call, what should I do?