iOS 12 Wifi calling stopped working

As suggested in this post: https://forums.att.com/t5/Apple/Wifi-all-of-a-sudden-not-working-on-iPhone-6/m-p/5654599#M302265, ignoring and resetting worked.

That post is about WIFI not working.  My issue is that phone calls over WIFI i.e. WIFI calling no longer activates. 

Same here - lost wi-fi calling, even though it says it's enabled in Settings and the nice people at AT&T say my account is provisioned correctly.

Hoping someone has a fix soon.   This is a great feature I use every day due to poor coverage at my home.

I tried that but it sadly does not fix the problem.   WIFI calling seem to be disabled by the update to iOS 12

Had the same issue with iOS 12 and WiFi calling this morning. Reset network settings then connected to my home WiFi again. After about a minute, AT&T WI-Fi appeared in the status bar again. 

I tried that (twice) and unfortunately the only thing left I have not done is restore my iPhone to factory settings and restore it.    Would love to not waste 1/2 my day doing that unless I know for certain that will fix it.

I have the same issue. I contacted AT&T and they hadn't heard of the problem yet! Not sure what to do but I suspect it's an AT&T "problem" not an Apple problem.  If you do a full restore and use a backup in the cloud that you have, won't the problem just return?

I have the same problem. I’ve tried everything (including resetting network settings). Still not working. 

Called both at&t and apple care. We looked at every setup and every steps to try...still jot working. 

APple care rep indicated it is a known issue and hoping it would get resolved ‘automatically’. 

This is no good. I am dependent on wifi calling....I don’t get at&t coverage at home. 

I have the same problem. I’ve tried everything (including resetting network settings). Still not working. 

Called both at&t and apple care. We looked at every setup and every steps to try...still jot working. 

APple care rep indicated it is a known issue and hoping it would get resolved ‘automatically’. 

This is no good. I am dependent on wifi calling....I don’t get at&t coverage at home. 

I am having same problem on my 7plus and on my wife iphone x after upgrading to ios 12 wifi calling is not working.

I turned WiFi calling off then in again, plus updated my E911 address, and it works. 

Tried all of that and no luck for me.  There definitely seems to be a bug in iOS.   It should not have killed wifi calling like this.

I think I will hold off on upgrading to iOS 12. @DWC1 What I would try next is set the phone back to factory settings and see if you can activate WiFi calling before restoring the backup.