This topic appears in bits elsewhere in this forum - but as yet I haven't seen a solution.
I use FoxyTag on a Nokia E71. Iuse bluetooth to connect the phone to my car, Lexus RX400h.
When the phone is connected to the car via bluetooth the audible alarm on FoxyTag does not sound.
If I disconnect from the car the FoxyTag alarms sound.
Is there a way to make the FoxyTag alarm sound when the phone is connected to the car with bluetooth.