My phone went into hands free mode automatically when I had a location set for my car. Settings\connections\location\my places. I believe the phone identified the car via blue tooth and switched to hands free mode automatically. I removed my car from my places and no more hands free mode coming on automatically.
Sent from my SAMSUNG-SM-N900A using Tapatalk
Galaxy Note 3 N900A - Stock CUCNC2
Gear 2 - Stock OBNE5
Galaxy Tab S 10.5 - Stock U1ANFB
Nexus 7 2013 32GB - LPV79/Root
Galaxy Note 1 - Liquid Smooth 4.4.4/TWRP
Dell Streak 5 - DSC TR/Root/CWR