I hate my new S21. The wifi calling does not work, they have done away with text message archiving and the dual sim card feature does not work with Firstnet. Going to return asap.
Solved! Go to Solution.
Wifi calling requires a separate set of settings on the phone. Your Network provider can enable the wifi calling functionality on your mobile.
It is working fine in my case after I spoke with my network provider to enable this functionality and they sent some configuration files which required a phone reboot to work.