AT&T Connectivity Problems Reported by Some iPhone 18 Pro Max Owners
Some U.S. iPhone 18 Pro Max owners have reported AT&T cellular and eSIM provisioning problems, leaving them unable to make calls, send texts, or use data. The U.S. iPhone 18 Pro Max is the only new iPhone this month with a Qualcomm modem, while other models use Apple's C2 modem. Apple is testing iOS 27.0.1 for next week, which may include a carrier update to fix the issue.
Reports of AT&T service trouble among U.S. iPhone 18 Pro Max owners have appeared on MacRumors Forums, Reddit, and Apple’s Support Community. Those affected describe being unable to make voice calls, exchange messages, or access mobile data, with eSIM setup also cited as a problem.
The U.S. iPhone 18 Pro Max is the lone new model this month using a Qualcomm modem, while the iPhone 18 Pro, iPhone Duo, and international Pro Max units use Apple’s C2 modem. Whether that difference matters remains unknown. Apple is testing iOS 27.0.1 for next week, which may carry a carrier update.
The disruption could affect U.S. iPhone 18 Pro Max owners who rely on AT&T for daily communication, work, emergencies, or travel. If unresolved, it may erode confidence in new device launches and carrier provisioning, while a quick software or carrier update could limit broader fallout. Other users and networks may be unaffected, but the episode may highlight how dependent people are on seamless mobile connectivity.