Hmm. The feature list for the Nokia 610 includes:

- External antenna connection

Nokia must be using the new BT profile that supports using the phone as the SIM & Phonebook only, and integrates an entire phone into speakerphone. That's pretty cool, and likely to provide much better coverage than the typical cellphone radiating inside the car situation.

Still, I seem to receive calls OK with my T610 buried in the crease of the driver's seat, even with the transmitter/antenna buried in there as well. Couldn't find it for a coupla days, and was quite surprised to be getting calls while out and about...

-brendan