Got a One-s this week but having some extremely infuriating issues when trying to use it on my in-car Bluetooth (Audi MMI). The phone pairs fine with the car and happily sends across phone book and call information. However, every so often the phone will drop the Bluetooth connection with the car. This seems to happen at any time, but is more likely to occur in the first 15 minutes after both are connected. Sometimes the phone will reconnect automatically, but most of the time the only way to reconnect is to go into Bluetooth settings on the phone and manually reconnect. Having done a bit of research, this seems to be a very common problem with HTC phones. If I can't find a way to fix this problem, the phone will have to be returned as it is essential that I can use it reliably with the car.