I thought I knew how Wifi calling worked. Not sure. I have an iPhone. If I enable Wifi Calling, the description says "Make and receive calls over Wifi with your AT&T account." When I'm in a coffee shop, will my calls be using their Wifi? When I'm at home will my calls be using my Comcast home network Wifi. Or is there some third option that it would be using data from my AT&T account? In other words, does it always use my selected network? Is there some situation where calls would incur charges other than my turning off Wifi to use AT&T cellular?
WiFi calling will never use your cellular data. Your phone should only switch to WiFi calling if your cellular signal is weak (like one bar), otherwise your phone will just stay on cellular for calls and texts even if connected to WiFi. WiFi calling is a way for your phone to connect to ATT’s network for calls and texts over WiFi instead of through a cell tower.
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