Carrier AT&T WiFi Calling - Maximum number of devices registered

[VineRider]

On my iPhone X, AT&T, I am getting an error that states "you have registered the maximum number of devices for this service" when trying to activiate wifi calling for my apple watch via my iPhone. I only have 4 devices (2 iPads, an iPhone, and the watch) so should not be hitting any limits

Has anyone else seen this or had any luck getting it resolved? I found the below out on the apple discussion forum, but no joy on a solution.

https://discussions.apple.com/thread/8475833?answerId=33786514022#33786514022

Anyone see this or have any ideas? I'm on iOS 12.1.2

 

[VineRider]

Update
I turned off wifi calling on all devices for a week. Turned back on and problem seems to be resolved

 

[jschnee21]

Why would you need Wi-Fi calling on your iPads?

 

[VineRider]

It allows you to make calls from ipad. Handy if you are not close to your iPhone

 

[imlynxy]

I was 2+ hours on the phone with Apple support and I was told that sometimes you have to turn off Facetime, calls on over devices including for 48-72 hours. I did the same for 2 days and it came back.