iPhone 18 Pro Max owners have spent two weeks watching SOS flash across their status bar instead of actual AT&T bars.
AT&T broke its silence today with a statement confirming the issue, though its fix so far doesn’t seem to be working.
What’s actually going wrong?
Affected phones lose AT&T connectivity for calls, texts, and data, either on and off or constantly, pushing the phone into SOS mode.
Reports about the issue date back to September 25, 2026, a week after launch. Many users have described it across Reddit and Apple’s support forums as well.
Here’s the detail that stood out to me: the US iPhone 18 Pro Max is the only new iPhone using a Qualcomm modem. The smaller Pro and the iPhone Duo run Apple’s own C2 chip everywhere else. Neither AT&T nor Apple has confirmed that, though.
Does AT&T’s fix work?
AT&T is asking customers to update to iOS 27.0.1 immediately. The carrier is messaging people directly. However, Apple’s release notes mention only Face ID and camera fixes; they say nothing about cellular problems.
Unfortunately, early reports suggest the update doesn’t fix the issue for people who were facing it. Some customers say their warranty replacement requests got denied outright. An alleged internal AT&T email says the guidance is really about limiting future impact rather than solving anything today.
If you bought your Pro Max on launch day, today is also your last chance to return it under Apple’s standard 14-day window. If you’re facing the issue, you might want to go to the store right now.
For those catching up, AT&T first acknowledged the issue publicly on October 1, a week after reports started piling up online.
