I got my 12 pro straight from Apple with an ATT SIM card. When I activated it, I was not receiving short code SMS messages so I couldn’t sign in to several apps as I wasn’t getting the verification texts. This was very frustrating as nothing online or in Reddit had a working solution and some said even ATT couldn’t help.
I went to the ATT store and and they changed the SIM card and it is fine now. Took 5 mins. The rep said he has seen several of these in just two days. Hope this saves you some headaches of trying to fix it yourself!
Building off of this I had the same issue with Tmobile last year. If you call T-Mobile they can activate short code SMS right over the phone and fix the issue
interesting...my wife and i had the same problem with our bank. i was able to fix the issue with putting it into airplane mode. a simple reboot wont do the trick. gotta turn off the carrier antennas.