On my S7 Edge Tomtom Go mobile hangs when you start it for the second (or more) time(s). You can solve it by killing the active 'Go' app but I found a better solution: In Apparaatonderhoud (Device Maintenance) - software from Samsung - choose Battery and have a look at the Savings (Spaarstand) settings. You should enable Netwerkgebr.achtergrond (Network use in the background). This solves the starting problem of TomTom Go. Probably a conflict or so. Have a look at the picture for the setting.