iOS SIM Must Be Associated with Apple Device: How to Fix

First reported on r/ios on June 26, 2026.

Some users are experiencing an issue with their iPhone 8 where they can't use iMessage, FaceTime, or send SMS messages. This article will guide you through the steps to fix the issue.

What it looks like

  • iMessage, FaceTime, or SMS not working

How to fix it

  1. Check your SIM carrier to ensure it is compatible with your iPhone.
  2. Restart your iPhone.
  3. Go to Settings.
  4. Tap your name at the top.
  5. Tap iPhone Settings or similar to find device association options.
  6. Ensure your SIM is associated with your Apple device.

Affected products

  • iPhone 8
  • iOS

Sources

Search terms covered: iphone 8 imessage not working, facetime not working