I noted you post suggesting that you turn the Hotspot on. I would appreciate some more information from you if possible as I have not got a device without the inbuilt sim so I cannot test your suggestion.
Are you finding that if you firstly connect your TT Devices Bluetooth connection that you can get the Handsfree Facility to work but that the Traffic and Smart messaging do not work.
Are you finding that if you also turn on the Phones hotspot and link that to the device that you now have Handsfree Phone plus Traffic.
If you do then have traffic working do you have to have the My Drive App working on the phone as well.
Regarding Smart messaging do you find that does not work with both Bluetooth and Hotstop connected and My Drive working or I it does keeping the connection is difficult.
On my devices with the inbuilt sim I cannot get a Smart Messaging connection but the Handsfree works fine.
I would appreciate your comments on the above.