Apple Acknowledges AT&T Network Bug On iPhone 18 Pro Max
Key Points:
- A bug affecting a small number of iPhone 18 Pro Max users on the AT&T network causes the phone to display "SOS" instead of signal bars, resulting in loss of calls, texts, and data connectivity.
- Apple confirmed the issue and released iOS 27.0.1 along with a carrier settings update to address the problem and prevent it from occurring.
- The iPhone 18 Pro Max is unique among US models for using a Qualcomm modem instead of Apple's own, though it's unclear if this relates to the bug.
- Affected users are strongly advised to update their devices to iOS 27.0.1 immediately via Settings > General > Software Update to resolve the connectivity issues.