V1565280997329 , via OnePlus 7 Pro , Apr 1, 2020 : VoWiFi is not working on my OnePlus 7 pro.. Earlier is was working with Airtel sim but suddenly it was disappeared. I couldn't see VoWiFi on top of status bar. It doesn't enable WiFi calling while make call to.others. I have checked all the settings WiFi calling is enabled for both jio and airtel sim but no luck.