I had a problem with Apple today and had to reset Apple ID password. Of course that was a complete 4.5 hour nightmare to get all the interoperability, handoff and such, working again. Took three Apple techs to get it going. Anyway, they asked me if the Wi-Fi calling setting was turned on or off. It does not exist in my phone. I am on ATT. Is this what the rest of you are seeing.....on ATT that is?