Was completely dead on the cell side. But, this was a fluke as I've always kept wifi calling in "wifi-only". In that mode it will not access the cell network in wifi, (though edge is theoretically available) but always in the past when I shut off wifi it would switch over to cell regardless. It's back to working normally. Thought I'd post as a follow-up to our discussion of the wifi-calling app and for anyone who finds themselves in the same situation.