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
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, 2008 Ford Edge, 58,000 mi
Sync cannot locate BT device.