Wifi calling doesn't work on my Galaxy S8 and doesn't even show up as an option in the phone's settings. Originally, it was available and did work, but after installing the November patch it disappeared from the settings menu. I was hoping the Oreo update would restore it but that hasn't been the case for me. Putting in a different sim card from either T-Mobile or Project Fi restored the option for Wifi calling but putting my Mint Sim card back in took it away again. Is there a fix for this?
My S8 is a SM-G950U, IMEI 35775408 with Android 8.0/Baseband version: G950USQU2CRB9