My Cingular Treo 650 works just fine with me early model BT module. My phone links every time I turn on the car, my speed dials are loaded into the car system, and the system sounds great. Verizon started screwing with the BT functionality with their V710 18 months ago, and they have sucked since.

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-'13 E93 M3 Cab, Interlagos Blue, Carbon Black leather, DCT, all options, and fun, endless fun!
-'13 X5 35i M-Sport, Carbon Black & Cinnamon, Dinan Stage 2!
-'15 Toyota Sienna Limited Premium AWD, Silver & Grey, Nav & BluRay, and less lame than the 2011 it replaced
-'07 Mini Cab S, Laser Blue, 6sp, endless fun that ended (sold)
-'04 X5 4.4i, loaded, loved, modded and sold