You do not need to do anything to reconnect TomTom BRIDGE to your phone.
TomTom BRIDGE will remember your phone and will find it automatically when you have Bluetooth tethering or Portable Wi-Fi hotspot turned on and you are in range of your device. If you have a valid TomTom services subscription, the service starts automatically.
On TomTom BRIDGE Status bar, check that TomTom BRIDGE is connected to the internet.
If you want to connect using another phone, you must connect using Bluetooth or connect using Portable Wi-Fi hotspot for that phone.
Tip: If reconnecting automatically to your smartphone using Bluetooth does not work, you can manually reconnect as described in Connect using Bluetooth.