Apple Addresses Cellular Service Issue Affecting iPhone 18 Pro Max on AT&T Network
Apple has confirmed that a “small number” of iPhone 18 Pro Max users on the AT&T network are experiencing a significant issue that disrupts their cellular service. This issue prevents affected devices from making phone calls, sending text messages, and using data, causing considerable inconvenience to users. The problem has prompted thousands of complaints across platforms, including the Apple Support Community.
Apple’s Response: Software and Carrier Settings Updates
In response to this issue, Apple released iOS 27.0.1 earlier this week, along with an AT&T carrier settings update today. These updates are designed to prevent more iPhone 18 Pro Max users from experiencing the same problem in the future. Apple is urging all users of the affected device to install iOS 27.0.1 by opening the Settings app on their iPhone and navigating to General → Software Update.
The carrier settings update will automatically download for AT&T users over the next 14 days. However, users can manually trigger the update by opening the Settings app and tapping on General → About.
Apple’s Official Statement
Apple’s statement, shared with MacRumors, emphasizes the company’s commitment to resolving the issue: “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.”
Replacement Required for Affected Devices
Notably, Apple has clarified that the iPhone 18 Pro Max devices impacted by this cellular issue on the AT&T network cannot have service reactivated through a software update. Instead, affected devices must be replaced entirely. Apple advises customers facing this issue to contact Apple Support or AT&T, or visit an Apple Store or AT&T location for assistance.
Issue Specific to AT&T Network
Apple has observed this issue exclusively among iPhone 18 Pro Max users on the AT&T network. No other iPhone models or carriers are known to be impacted at this time. The root cause of the issue remains undisclosed. U.S. models of the iPhone 18 Pro Max use Qualcomm’s Snapdragon X80 modem for cellular connectivity, while variants sold in other countries feature Apple’s custom C2 modem. It is unclear whether this modem difference is related to the AT&T issue.
Next Steps for Affected Users
While an Apple Service Program dedicated to this issue has not been announced, Apple Stores are reportedly replacing affected iPhone 18 Pro Max devices free of charge. Customers experiencing this problem are encouraged to book an appointment with the Genius Bar if necessary.
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