This all sounds so awesome. I hope AT&T eventually implements this; it's going to rock at work because deep in the building there's barely any cellular coverage but I have amazing Wifi most days.
EDIT: Oops I need to read more carefully; you said FACETIME calls. Heh. Doesn't change that I want Wifi calling on AT&T though.
EDIT: Oops I need to read more carefully; you said FACETIME calls. Heh. Doesn't change that I want Wifi calling on AT&T though.
Here's a really great change for 8.1 (BETA 1 and 2).
FaceTime calls initiated over WiFi will now transfer to LTE (and 3G?) just fine when you leave the house. Interestingly, the call will transfer quite smoothly (cuts out for just a second or two) when the call detects the WiFi signal dropping significantly.
If you just turn the WiFi off manually, there's a MUCH longer delay before the call is successfully transferred to LTE, so it appears Apple is switching gracefully from WiFi to LTE when it sees the signal dropping to zero (as it would do as you smoothly move out of range).
However, when you're on LTE and come back to your house, the call will NOT transfer back to WiFi, for some reason. If you hang up the call, your phone will instantly connect to the WiFi. You can, of course, manually force the phone to connect to your WiFi network. This does actually transfer the call over from LTE to WiFi (tested by disabling cellular data).
Either way, prior to 8.1, if you left your WiFi network while on a FaceTime call, the call would drop completely.
This is a welcome change! I'm updating the Wiki to reflect this.
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