iPhone 18 Pro Max Users Report AT&T SOS Failures 9 Days After Launch
Updated
Updated · The Apple Post · Sep 27
iPhone 18 Pro Max Users Report AT&T SOS Failures 9 Days After Launch
3 articles · Updated · The Apple Post · Sep 27
Summary
U.S. iPhone 18 Pro Max owners on AT&T say their phones are repeatedly dropping into SOS mode, leaving calls, texts and mobile data unavailable on some devices.
Customer reports since the Sept. 18 launch point to eSIM activation or carrier provisioning trouble, with some users saying repeated reprovisioning failed and AT&T support described it as a known network issue.
Apple and AT&T have not confirmed a cause or said how widespread the problem is, and reports suggest it affects only a subset of AT&T users rather than all iPhone 18 Pro Max units.
One hardware difference remains under scrutiny: the U.S. iPhone 18 Pro Max uses a Qualcomm modem, while the smaller iPhone 18 Pro and overseas Pro Max models use Apple’s C2 modem, though no link has been established.
Apple is testing iOS 27.0.1, but it is unclear whether a software update, carrier settings change or AT&T-side fix will resolve the issue.