[AC Question]

I don't know how to use it at all, where do I tap to answer phone?

[B. Diddy]

Welcome to Android Central! When you get a call, touch and drag the phone icon outside of the large circle.

This might be helpful to read: http://downloadcenter.samsung.com/co...1.0_140926.pdf

[anon8380037]

Yes, to make it easier, you may have a setting similar to my Note 3 in Device - Accessibility - Answer and End Calls - Home key to Answer, Power key to end.
There are other proximity and mute functions with Motion Controls.