Garmin Bluetooth and iphone 3G incompatible

Very disappointed to learn after buying a Garmin 1390T that all Garmin bluetooths are incompatible with 3G and 3GS. My daughter has the same Garmin 1390T but because she hasnt updated to latest version 3.1 software, hers works fine. I have updated an mine doesnt. Evidently this last version is what did it. Garmin is changing their website soon to reflect that the only iphone they guarantee is compatible is the first generation iphone. Im sure this has something to do with the fact theyve put out their Nuviphone to compete with iphone. What a shame that you spend 350 bucks on something that clearly says on its website is compatible with iphone but clearly is not. It causes the garmin to frequently reboot itself and when I do make a call the person on the other end can barely hearing. So if anyone else is considering purchasing a garmin gps with bluetooth, make sure you havent updated your iphone to latest software.
Trisha
pc Windows XP