Setting up car telephony with a mobile phone via Bluetooth® SAP
Requirements:
Bluetooth® is activated on the mobile phone (see the manufacturer's operating instructions).
Bluetooth® is activated on the multimedia system More.
The mobile phone supports the Bluetooth® profile SAP (SIM Access Profile).
Multimedia system:
Select Connect new device.
Select a mobile phone with the SAP Bluetooth® profile.
Connect the mobile phone with the multimedia system via Secure Simple Pairing or the passkey More.
Enter the SIM card PIN and confirm.
If the mobile phone is connected as a car phone, calls cannot be made on the mobile phone, since its SIM card is being used by the vehicle.
Connect the mobile phone to the MBUX hotspot for data reception More.
Changing between Bluetooth® telephony and car telephony via the SAP Bluetooth® profile
To switch to Bluetooth® telephony:
select the 
symbol in the line of the mobile phone in the device manager. Select Use as Bluetooth phone.
The mobile phone is no longer connected via the Bluetooth® SAP profile but via the Bluetooth® HFP profile (Hands Free Profile).
To change to car telephony via the Bluetooth® SAP profile:
select the symbol in the line of the mobile phone in the device manager. Select Use as car phone.
The mobile phone is connected using the SAP Bluetooth® profile.
This option is only shown if the mobile phone supports the Bluetooth® SAP profile.