Hi, This is a question rather than a complaint. When I enabled TMo's wifi calling in iOS8, I was presented with a warning that I would not be able to perform any calls through the laptop anymore. FWIW, I am using a late 2013 rMBP, iP5s, and the latest edition time capsule. All of which claim to have pretty quick wifi speeds. In lay terms, I would like to know why. Is it a technical limitation? Is it imposed by Apple? Thanks for helping me make sense of this!