I can't believe how lousy FaceTime and FaceTime Audio are. Whether I'm using Wifi or LTE, iPhone 6 or iPad Air, FaceTime is terribly, embarrassingly unreliable. It cuts out, it takes 10 seconds or more just to connect ("Hello?" "HELLO??!" "Can't hear anything" "HELLLLLOO!??") and the video is laggy and low quality. I am really surprised and disappointed that a service that Apple has been offering for years now (and that was launched on vastly inferior hardware) is this crappy. FaceTime Audio should be a permanent alternative to cellular calls between iPhones like iMessage is a permanent alternative to SMS. But it's not because it sucks.