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Story summary
- AT&T warned U.S. iPhone 18 Pro Max users of cellular problems and urged installation of iOS 27.0.1.
- Affected devices cannot complete calls, texts, or data and often switch to SOS mode.
- Thousands of users reported the issue on Apple Support Community, Reddit, and MacRumors forums.
- iOS 27.0.1 release notes mention only a Face ID fix.
- Many users say iOS 27.0.1 does not resolve the connectivity issue.
