Aswering calls from upper half screen operative...

I have ordered a new phone, but in the meanwhile, I need to answer calls

https://play.google.com/store/apps/details?id=com.sch.answergesturefree

... reducing thresold (negative) value, and drawing just a horizontal line in the upper part of the screen, I can answer calls.

To end calls, I have configured power button in android