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. Apple's full statement: We have identified an issue affecting a small number of iPhone 18 Pro Max users on the AT&T network that may cause a device to lose service and be unable to make calls. We released iOS 27.0.1 earlier this week and strongly encourage all iPhone 18 Pro Max users to update now, and are also issuing a carrier settings update today. These updates together are meant to help prevent this issue from occurring. Notably, Apple said that iPhone 18 Pro Max devices that have been affected by this cellular issue on the AT&T network cannot have service reactivated with a software update. Instead, Apple said the device must be replaced entirely, and it advises affected customers to contact Apple Support or AT&T, or visit an Apple Store or AT&T location. Apple said it has only observed this issue with iPhone 18 Pro Max users on the AT&T network. No other iPhone models or carriers are known to be impacted. Apple did not disclose the underlying cause of the issue. U.S. models of the iPhone 18 Pro Max rely on Qualcomm's Snapdragon X80 modem for cellular connectivity, while variants of the device sold in all other countries are equipped with Apple's custom C2 modem. It is unclear if this modem difference is a factor in this AT&T issue. It is also unclear if there will eventually be an Apple Service Program dedicated to this issue. In the meantime, it sounds like Apple Stores will replace affected iPhone 18 Pro Max devices for free, so book an appointment with the Genius Bar if necessary. Popular StoriesApple Event Live Blog: iPhone Duo, iPhone 18 Pro, and MoreWednesday September 9, 2026 9:10 am PDT by Jordan GolsonApple's "Surprise and Shine" event kicks off today at 10:00 a.m. Pacific Time, where we're expecting to see the foldable iPhone Duo, the iPhone 18 Pro and Pro Max, Apple Watch Series 12 and Ultra 4 models, new AirPods 5 earphones, and perhaps some other announcements. Apple is providing a live video stream on its website, on YouTube, and in the company's TV app across various platforms. We...iPhone 18 Pro Prices Estimated Ahead of September 9 Apple EventThursday September 3, 2026 3:41 am PDT by Tim HardwickLess than a week before Apple debuts new iPhone 18 Pro models, research firm TrendForce estimated the prices of the devices based on the latest hardware cost environment. TrendForce's price estimates compared to last year's models look like this: Model Starting Price Model Starting Price Change iPhone 17 Pro $1,099 iPhone 18 Pro $1,24...Apple Event Today: iPhone 18 Pro and iPhone Duo Cheat SheetTuesday September 8, 2026 10:24 am PDT by Tim HardwickApple's biggest event of the year is almost here, and all eyes are on Cupertino. With the first foldable iPhone expected to headline Apple's "Surprise and Shine" event on Wednesday, September 9, at 10:00 a.m. Pacific Time, the rumor mill has been running full throttle, fuelled by the biggest single design change in the life of the iPhone. To get you up to speed, here's a quick reference...