First you must establish a connection between your mobile phone and your TomTom Taxi Assistant device.
Tap Phone in the Settings menu. If this is the first time you have connected a phone, tap Yes to search for your phone. If you have already connected a phone and want to connect another phone, tap Manage phones in the Phones menu, then tap Add.
Tap your phone when it appears in the list.
You only need to do this once then your TomTom Taxi Assistant device will remember your phone.
Tips
For additional information about Bluetooth settings, refer to your mobile phone user guide.