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douglaswbecker
User level: Level 1 (4 points)

Multi-Factor SMS text Messages not arriving on Apple phones using AT&T as the cell provider after version 27.0.1 update

Multi-factor messages not arriving on ATT after Apple’s 27.0.1 update -I went through five hours of mind-numbing tech-support with AT&T yesterday trying to figure out why MFA six number verification messages were not arriving all of a sudden after I updated my phone to the 27.0.1 version of Apple. Finally, we figured out that I needed AT&T tech to ‘reprovision my MFA gateway for IMS/SMS messages, due to a corruption of the token, allowing the cell tower to talk to my iPhone 16”. I know that is completely high-level tech talk, but if you have to go through the same thing, you have to keep asking ATT for high-level tech-support ATT, as the lower level people do not have that authority, which was the only thing that finally worked.

Posted on Oct 17, 2026 5:43 AM

4 replies

Chattanoogan
User level: Level 8 (43,489 points)

Oct 17, 2026 5:51 AM in response to douglaswbecker

Mind-numbing is a charitable way to describe spending the better part of your day on the phone w/ your carrier. 🙁


But you’re absolutely correct …


… polite persistence is too often the only way to get results.

lkrupp
User level: Level 7 (28,946 points)

Oct 17, 2026 5:56 AM in response to douglaswbecker

Who ever said technology always goes as smooth as silk? Yes, frustrating as as can be but things have gotten so complicated that every hardware manufacturer and every service provider have the same problem.


We are small fish in a giant ocean of users and anything can go wrong. Taking the time like you did to get to the bottom of the problem was an exercise in patience and determination. Many would simply have given up and switched carriers in anger. However, there’s so much subscriber churn that these carriers don’t prioritize customer service anymore.


Excellent perseverance on yur part!

Jeff Donald
User level: Level 9 (64,078 points)

Oct 17, 2026 11:38 AM in response to douglaswbecker

Thank you for sharing your experiences and posting about it. I can appreciate what you went through having done similar things in the past. It’s not easy to do, but if you can get senior engineering work on the issues things get resolved.


I hope you have a great rest of your weekend!

mike1976
User level: Level 1 (8 points)

Oct 21, 2026 4:50 PM in response to douglaswbecker

It is happening with Verizon too; multiple instances on my iPhone 15 since I installed the update - with various apps & actual transactions over the last 72 hours… Quite unacceptably worrisome - for Apple and the carrier.

Originally posted at discussions.apple.com/thread/256377818