My spouse and I both have new 5s and we are using them with bluetooth speakers in our cars. The speakers are a year or so old, and were previously used with an iPhone 4 and a Windows phone. Since the 5, when we are driving and both the phone and speaker are stationary, they will disconnect (so the speaker states "connection with ____ has been dropped") and then 15-30 seconds later it will spontaneously reconnect. I don't have any other Bluetooth items in the vehicle that could be interfering. Ideas?