AT&T claims iOS 27.0.1 resolves iPhone 18 Pro Max cellular problems, but early reports indicate the update does not fix the issue. AT&T sent an automated text urging affected users to update to iOS 27.0.1 immediately, warning phones may be unable to complete calls, texts, or data, including to 911. Apple released iOS 27.0.1 earlier this week, with release notes citing Face ID and camera fixes for iPhone 18 Pro and iPhone 18 Pro Max, but no mention of cellular connectivity repairs.
Many AT&T users who updated on Monday still see "SOS" in their status bar and cannot connect for calls, texts, or data. The issues appear exclusive to the iPhone 18 Pro Max, which uses a Qualcomm modem, while the iPhone 18 Pro with Apple's C2 modem seems unaffected.
Source: 9to5Mac · Summarized by HeadlinesBriefing