Calling currently broken, but it's been sporadically broken quite often recently

[Kleestarr]

Today I am completely unable to make or receive calls. Texts and internet seem fine. I've done some testing. I happen to have a lyca sim that I was able to swap, so I know all my hardware is working. But on the 12th of January I know someone attempted to call me and it never went through and I never received any missed call notification. That person was able to call me on 16th of January but obviously I have no idea what status was on 13th-15th. Any idea what is going on?

[nhkrba]

My Three on iPhone 12 Pro isn’t working. I can’t call or recieve normal phonecalls

[Kleestarr]

Thing is, I don't even make many calls, so I have no idea how many I may have missed receiving. I knew I should never tell people not to leave me messages because I never bother to listen to them, I'd just call them back when I see I have a missed call...oops.

[Tangerine13]

I cannot make or receive any calls today either

[tf2006]

No idea. 3 are still telling me there are no issues and nothing has been reported. Although I reported it