I when to the Sync My Ride website and found the M300 has been tested by ford and it is not fully compatible.
They say ""- Samsung M300 (firmware version M300AE07): Although this phone will pair and connect to Sync, each time you attempt to make an outgoing call, Call Ended will appear on the Sync screen.""So I guess I am taking back my phone because the whole reason I got a new one was Bluetooth for Sync.
Seems like a firmware update is assuredly in order.
Although I suppose ensuring the phone is compatible with the car is always important when deciding which phone to go with during your purchasing process.
Sorry you are having such troubles ladies/gents!