Wi-fi calling stopped working
We live in a rural area with poor service. Wi-fi calling is a godsend. It has worked splendidly until about a week ago. Now, even when we have a strong wi-fi signal, there is "no service", i.e. no wi-fi calling, on any of our phones (iphone 6s). We can neither make nor receive calls. We've rebooted our router and phones - no change. The wi-fi speed test shows ample capacity. Please help.