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Yay...just checked for WiFi calling the other day and it wasn't available yet. Now it is. How do you enable VoLTE...??
 
Wifi calling is enabled in my area. When I go to Phone > WiFi calling; I get a welcome splash screen and another screen with a bunch of disclaimers regarding 911 etc. However, when I click Continue, I get a "Oops! This wasn't supposed to happen. Give us a minute and we'll get it fixed so you can try again" message with a Retry button which goes to the previous step. I am hoping this gets sorted out sooner than later, since the same message has been popping up for several hours now.
 
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