AT&T issues urgent warning to some iPhone 18 Pro Max owners to update their software right away

Owners of the new iPhone 18 Pro Max who are using the phone on AT&T’s network, take note: The telecom giant has issued an urgent warning instructing users to update to the latest version of iOS 27. Here’s what you need to know. What’s happened? Two weeks ago, Apple’s new iPhone 18 Pro and iPhone 18 Pro Max went on sale. The devices are Apple’s latest flagships and run the company’s new operating system, iOS 27. By and large, the launch of the new iPhone seems to have gone smoothly—except for some people on AT&T’s network. Shortly after the iPhone’s launch, owners of the iPhone 18 Pro Max who were using the phone on AT&T’s network began reporting problems with the handset. These problems included issues like no cellular signal, interrupted data, and text messages that did not go through. Interestingly, these problems only seemed to affect iPhone 18 Pro Max users—not users of the regular iPhone 18 Pro. As MacRumors has noted, the iPhone 18 Pro and the iPhone 18 Pro Max use different cellular modems. The 18 Pro uses Apple’s new C2 modem worldwide, while the 18 Pro Max uses Qualcomm’s Snapdragon X80 modem in the U.S. market. Only the iPhone 18 Pro Max seems to be having connection iss…