The "Sync" wireless phone system may randomly loose "pairing" with the phone in use. This concern has been addressed with a software update which should be available from any Ford dealership service center at no charge.Google+
Car Problem Reports
Ford Edge Sync Multimedia System Does Not Stay Connected With Phone
Ford Edge Problem
Average Mileage: 52,666 mi (21,000 mi - 65,000 mi)
The Sync wireless phone system will loose "pairing" on some phone randomly. This concern has been addressed with a software update available at a Ford dealership service center at no charge.
Visitor, 2011 Ford Edge, 21,000 mi
since i bought the car the sync with my phone will quit for no reason...occasionally...
Also, the turn signal intermittently turns on and off or WON'T TURN OFF
since car turned over 50,000 mile...
Visitor, 2011 Ford Edge, 60,000 mi
Will not stay syned to phone or tablet.
Never does stay Synched
Visitor, 2008 Ford Edge, 58,000 mi
Sync cannot locate BT device.