Hangouts gives you better call quality by skipping Google
 

If you don't think Hangouts calls on your phone are passing muster, don't worry -- relief might be in sight. The latest version of Hangouts for Android is telling users that it'll boost audio and video quality on future calls by making peer-to-peer...

http://www.engadget.com/2016/02/06/h...ls-on-android/