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Some iPhone 18 Pro Max phones on AT&T are stuck in SOS mode. Two updates can prevent it, but affected phones need replacing.
iPhone 18 Pro Max AT&T call failures may be fixed by iOS 27.0.1, but some users report mixed results after updating.
AT&T is warning iPhone 18 Pro Max customers to update their devices immediately as an ongoing cellular issue could prevent affected phones from making calls, sending texts, using mobile data, or even reaching 911. The carrier