On October 2, 2026, Apple said a small number of iPhone 18 Pro Max users on AT&T may lose cellular service and be unable to make calls. The statement describes a device-specific issue, not a general AT&T network outage.
Updates are intended to prevent service loss
Apple urged all iPhone 18 Pro Max users to install iOS 27.0.1 and said an AT&T carrier-settings update was also intended to help prevent the issue. Apple expected the carrier update to download automatically over a 14-day period. To check for it, open Settings > General > About.
Phones that have lost service need hardware replacement
The updates are preventive; Apple said they will not restore service on a phone that has already lost cellular connection. Its guidance for those devices is hardware replacement through Apple or AT&T. Owners can contact Apple Support or AT&T.
