samsung s20 fe

bob6466, That is a great question. Thank you so much for stopping in for help with the Wifi calling feature for your Samsung F20 FE. Most phones support this feature regardless of the provider, since it can be used when there is no cellular data available. If the feature is not working, there may be an issue with the device, but we would be more than happy to help look into it further for you, so we can make sure we rule out all issues on our end for you.