Treo 650 (and other as well) support a somewhat limited Bluetooth stack.
Headsets and serial-service BT accessories (e.g. GPS sensor) work, tough they may be fussy and limited in their functionality.

Experience that can be reported:
1. Treo 650 can work with Motorola HS8xx Headsets in basic functionality mode (E.g. No Auto-transfer of calls to headset, no
voice-dialing from Headset). In addition, volume is relatively low, and some people find the voice quality sent poor
2. The Palm Bluetooth headset works better, with more advanced functionality (but still no voice dialing). Volume is still
relatively low, and the Headset has a tendency to disconnect and requires frequent re-pairing with the Treo

Treo does not appear to support Bluetooth music headsets.


Difference between Bluetooth's.