Given that the 5 and 5c are virtually the same phone in a different case, I can only imagine that restricting wifi calling to the 5c is a slightly cynical marketing ploy by EE.
I have a Virgin Mobile/Sprint iPhone 5s and live in San Francisco, but I'm not seeing the the Allow WiFi option in the Phone settings. I updated the OS and Carrier (19.1) Is it because of my location or because I'm on Virgin that I don't see it?
Yes it does. On Sprint it turns off once you leave wifi no matter whether you're dropping to LTE or 3G. On T-Mobile the calls can hand off to VoLTE when you leave the Wifi area provided that you're in an LTE area.
I have a Virgin Mobile/Sprint iPhone 5s and live in San Francisco, but I'm not seeing the the Allow WiFi option in the Phone settings. I updated the OS and Carrier (19.1) Is it because of my location or because I'm on Virgin that I don't see it?
Yes it does. On Sprint it turns off once you leave wifi no matter whether you're dropping to LTE or 3G. On T-Mobile the calls can hand off to VoLTE when you leave the Wifi area provided that you're in an LTE area.
Yup. Dropped a call moving from one WiFi to a different one. Nice feature for when you're at home or work staying near one WiFi spot and not moving around too much.