iPhone 18 Pro Max users face major AT&T glitch: Apple asks some US users to swap phones

Apple is asking some AT&T customers to replace their iPhone 18 Pro Max after a cellular bug left affected devices unable to make calls, use mobile data or send texts. Apple says the issue affects a small number of users and has released iOS 27.0.1 and a carrier settings update, but phones already hit by the glitch need to be swapped.