No Update Can Fix an iPhone 18 Pro Max That Lost AT&T
Apple confirmed on October 2, 2026 that some iPhone 18 Pro Max phones on AT&T lose cellular service, and that a phone already stuck on SOS has to be replaced. iOS 27.0.1 and a carrier settings update are meant to help prevent the problem on phones that still work. Here is what to do in each case, and what Apple has not said.