Originally Posted by
Lurker1999
I'm on a Nexus 4 (Android) so no wifi calling unfortunately. I guess I'll be trying Keepcalling.com's Android app where I still have a bunch of leftover minutes and that does use wifi.
Nexus 4 supports wifi calling. I have personally used GrooveIP and currently use spare phone. As the second link suggests, echos are reduced for me with spare phone.
http://forum.xda-developers.com/show....php?t=2038383
http://forum.xda-developers.com/show....php?t=2001290