I have yet to find it doesnt support a BT enabled radio. Have these personally and have hooked it up to several friends cars using Alpine, etc. I dont use voice dial so I cannot attest to that feature.
Clarion FB275BT
Sony MEX-BT2500
I have a T505 as well and a HTC BH-S100.
Just wanted to add that my Clarion is now glitchy with the autoconnect after a phone call when using Pandora at the same time. This used to work great up until 1.2.x