OEM BT45-INFI Owner's Manual page 12

* Please keep in mind that the environment inside a moving
vehicle tends to be noisier than your average environment. This
will affect how accurately your phone's voice recognition function
such as Siri picks up your voice command.
12
Outgoing Call
Manually switch over to
Bluetooth/SAT mode from
your radio
Dail the outgoing call from your
phone.
You can also engage your
phone's voice dialing* function
trough BT45's microphone.
To end the call
From radio:
Press/turn the SEEK/TUNE
DOWN button/knob
From steering wheel:
In some vehicles you my have to
press & hold the SEEK/TUNE
DOWN or CH- button