What happens to my 2014 Ford Escape and my LG Exalt is simply this . . . The Exalt actually goes into Privacy Mode - no set pattern - but daily. If you pick up the Exalt handset you just hit 'OK' and it will connect you on the phone with your call and caller - but not over the voice command module in the Ford Sync system.
Opening the flip phone DOES NOT solve the problem.
It is maddening that one of the cheapest phones out there can't sync with Sync . . . even with Bluetooth 3.0