Overview
- Apple confirmed on Friday that a small number of U.S. iPhone 18 Pro Max units on AT&T can lose cellular service and be unable to make calls, and it says devices already affected require hardware replacement to regain service.
- AT&T has sent automatic texts urging Pro Max customers to install iOS 27.0.1 immediately and is working with Apple while advising affected users to seek support at Apple or AT&T stores.
- Apple released iOS 27.0.1 and an AT&T carrier settings update (72.1) intended to stop new cases, but the iOS 27.0.1 release notes do not list a specific cellular fix and many users report the update did not restore service on phones already showing SOS.
- Reports and company notes point to the issue being concentrated on U.S. Pro Max models that use a Qualcomm Snapdragon modem, though Apple has not confirmed the modem or any single technical cause.
- Customer experience varies: some users received replacements that fixed the problem while others say stores denied swaps or handled requests inconsistently, and the outage raises real emergency-call concerns for affected owners.