howiedub wrote:
Searched online and haven't found anything saying that Lollipop itself will have Wi-Fi Calling baked in. All I have found is that it will have better network handoff so that if you're on a VOIP call (i.e. - Google Hangouts) on Wi-Fi and switch to cellular data, your VOIP call won't get dropped. As for band 12, if the Moto X has the same radio as the Nexus 6, then I don't see why it won't support band 12. Currently, Motorola support says that band 12 isn't supported on the Moto X, but that doesn't mean it won't be later on.
There is more than just a radio to get the bands supported.