Sometimes you can not touch your Android screen and swipe to answer the incoming calls. In this situation you can answer calls with home key on Galaxy Note 2, Note 8, Galaxy S2, Galaxy S3 and other Samsung phones and tablets. To enable or disable this feature do as follows:
Note that, for Galaxy S4, you can use Air Gesture to answer calls without touching the screen. See: How to Air Call Accept on Galaxy S4?
1. Open "Phone" App
2. Press Menu Button and select "Call Settings"
3. Tap "Answering/ending calls" to manage call answering/ending settings
4. Mark "The Home key answers calls" to accept incoming calls by pressing the home button