Sociolatte

Samsung Galaxy S4 users have something called Air Gestures  -- they can use it to answer calls by a simple wave of the hand in the air. Users of other Android phones who'd like to get have this feature can do so now through an Android App called Air-CallAccept. There are two versions of the App. The free version allows users to accept calls using an air gesture like a wave of the hand in the air. Or putting the handset to their face. The paid version of the app lets users use gestures to even reject calls and send canned SMS when they reject a call.

How to use Air gestures to answer calls on your Android phone
All you need to do is download the app and install it and it's ready to go.

Air gestures are the new thing for SmartPhones and a lot of phone makers are starting to offer air gestures to answer and reject calls. So if you want this new feature on your Android phone. Please find the links below.

Air-CallAccept free version
Air-CallAccept Paid version ($2.99) via XDA