Apple Admits Software Cannot Revive iPhone 18 Pro Max Phones Stuck in SOS on AT&T, So It Is Swapping Them

Apple's newest flagship has a problem that no update can undo. On Friday, the company confirmed that some iPhone 18 Pro Max units on AT&T lose cellular service entirely, getting stuck in SOS mode with no calls, no texts and no data. Wi-Fi still works. Almost nothing else does.

The twist is in the fine print. Phones already hit by the bug cannot be reactivated through software. They have to be replaced outright, through Apple Support, AT&T, an Apple Store or an AT&T location.

A fix for the phones that still work

"We have identified an issue affecting a small number of iPhone 18 Pro Max users on the AT&T network that may cause a device to lose service and be unable to make calls," Apple said. The company pointed users to iOS 27.0.1, released earlier in the week, plus a carrier settings update issued the same day. Together, Apple said, those updates "are meant to help prevent this issue from occurring."

Prevent is the key word. The carrier update rolls out automatically over 14 days, or users can trigger it by hand under Settings > General > About. For anyone whose phone has already dropped off the network, that is too late.

AT&T was blunter in a text to customers, according to ZDNET: "Some phones may be unable to complete calls/text/data, including to 911. Update to iOS 27.0.1 immediately." A phone that cannot reach emergency services is not a minor glitch.

Thousands of complaints, no explanation

Owners have been reporting the problem since launch, a couple of weeks ago, and thousands of complaints have piled up on Apple's Support Community and Reddit. Apple says it has only seen the issue on the 18 Pro Max on AT&T, not on other models or carriers. It has not said what causes it or how many phones are affected.

Apple Stores appear to be handling replacements for free, though it is unclear whether a formal service program will follow.

There is one hardware detail worth watching. US models run Qualcomm's Snapdragon X80 modem, while phones sold elsewhere use Apple's own C2 modem. A TechInsights teardown found the iPhone 17 Pro used the same Qualcomm part, but the 18 Pro Max appears to add a new millimeter-wave antenna. Neither Apple nor AT&T has tied either component to the failures.

It is an awkward moment for a company that is busy promising bigger leaps, from the $1,999 iPhone Duo foldable to tighter macOS controls meant to keep AI agents out of private files. Right now, some of its newest flagship owners would settle for a phone that can make a call.