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6d ago

Apple and AT&T Push Fixes After Some iPhone 18 Pro Max Units Lose Cellular Service

Companies say software and carrier updates should stop new failures while affected phones must be replaced in stores.

An iPhone 18 Pro and an iPhone 18 Pro Max are displayed at the Apple Fifth Avenue flagship store during the launch of the new phones in New York City, on Sept. 18, 2026.
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Overview

  • A small number of iPhone 18 Pro Max phones on AT&T have lost the ability to call, text or use mobile data and show “SOS” in the status bar.
  • Apple released iOS 27.0.1 plus an AT&T carrier settings update intended to prevent further occurrences for devices that are currently working.
  • Devices already stuck with no cellular service cannot be restored by software and must be replaced in an Apple Store or AT&T retail location.
  • Apple issued an emergency AT&T carrier bundle (version 72.0.3) for users running the iOS 27.2 beta after rolling 72.1 for iOS 27.0 users.
  • The problem appears limited to U.S. iPhone 18 Pro Max models that use a Qualcomm modem, Apple and AT&T say, but neither company has released an affected‑unit count or a confirmed technical cause and forum reports show widespread customer complaints.