I enabled wifi calling on AT&T on my iOS 9 GM iPhone 6 Plus. Works well, but, I haven't been able to (yet) test it in a few different scenarios, and wanting to know if anyone else has figured this out: 1) Lets say you're away from your emergency address and using wifi calling. Let's say you're at a starbucks making a call to 911. Will the phone send the address you previously gave it (your home), or will it use the GPS coordinates and send that info to 911? 2) Same thing, but you're making a normal call. The Wifi sucks (slow). Will the phone switch to cellular automatically? 3) If I initiate a call on wifi, can I leave the wifi area and seamlessly transition to cellular? 4) If I'm on cellular, and enter a wifi area -- will the phone switch seamlessly? Thanks!