Apple Says iPhone 18 Pro Max Users With AT&T Cellular Issue Need to Have Device Replaced

Apple today confirmed that a "small number" of iPhone 18 Pro Max users on the AT&T network have experienced an issue that causes the device to lose cellular service, thereby preventing phone calls, text messages, and data from working. Thousands of users complained about the issue across the Apple Support Community and other platforms. Apple said it released iOS 27.0.1 earlier this week and an AT&T carrier settings update earlier today to help prevent more iPhone 18 Pro Max users from being impacted by this issue going forward. In a statement shared with MacRumors, Apple strongly encouraged all iPhone 18 Pro Max users to update to iOS 27.0.1 now. To install the update, open the Settings app on your iPhone and tap on General → Software Update. The carrier settings update for the iPhone 18 Pro Max will automatically download for AT&T users over the next 14 days, according to Apple. To manually trigger the update, users can open the Settings app and tap on General → About.