Apple acknowledges AT&T network bug on iPhone 18 Pro Max

Apple confirmed a hardware issue affecting a small number of iPhone 18 Pro Max users on the AT&T network, causing devices to enter SOS mode and lose cellular service. This bug prevents phone calls, text messages, and data functionality. While thousands of users reported the problem, Apple released iOS 27.0.1 and an AT&T carrier settings update to prevent further occurrences. Apple strongly encourages all iPhone 18 Pro Max users to install iOS 27.0.1 immediately via the Settings app.