Overview
- In an updated support document, Apple instructs users to open Settings > Apps > Messages and turn iMessage off, wait briefly, then turn it back on after finishing eSIM activation.
- The problem chiefly affects people who skipped eSIM setup during onboarding and those who add a new eSIM later when switching carriers.
- Visible signs include “Not Delivered” alerts, conversations falling back to green SMS/RCS bubbles, or messages sending from an email address instead of the phone number.
- Guides highlight additional steps such as removing inactive or duplicate SIM profiles, ensuring SMS and data connectivity, and signing out of and back into your Apple ID.
- Apple also offers an online activation option for iMessage and FaceTime at apple.co/IMFT-mac for users who need an alternative path.