General Phone Information

Calls may disconnect in the following situations:

• Insufficient network coverage

• Lack of free voice channels when you travel into a new transmitter/receiver area (cell)

• Phone SIM card is not compatible with the available network

• The second SIM card of a Twincard mobile phone is already logged onto the network

In addition, voice quality may fluctuate. The infotainment system supports high quality calls in HD Voice®, but this depends on HD Voice® being supported by both the mobile phone in use and the network.