AT&T calls failing for some iPhone 18 Pro users

Some iPhone 18 Pro and Pro Max owners on AT&T cannot make or receive cellular calls, with signal stuck on SOS or relying on Wi-Fi Calling. The issue is tied to eSIMs; AT&T has acknowledged it while Apple has not, and only a small number of users are affected.

• Cellular calls fail, but Wi-Fi Calling still works
• AT&T acknowledged the issue and suggests reverting to iPhone 17 Pro Max
• The problem is linked to eSIMs; Apple has not commented
• AT&T also said it won't support Apple's iPhone Handoff in iOS 27