Your Apple Watch Ultra 3 usually won’t show text messages when the watch and iPhone aren’t connected correctly, notifications are turned off, or Messages/iMessage isn’t set up right on the phone. Apple also says you should check Do Not Disturb, Airplane Mode, iMessage sign-in, and watch/iPhone updates first.

Common causes

  • Do Not Disturb or Airplane Mode is on on the watch. Apple says those can block message alerts.
  • The watch isn’t properly connected to your iPhone, Wi‑Fi, or cellular. Apple notes SMS/MMS on cellular models still require the paired iPhone to be powered on and connected, while iMessage can work over Wi‑Fi or cellular.
  • iMessage is off, or your Apple Account on the watch and iPhone doesn’t match. Apple recommends checking both in Messages settings.
  • Your iPhone itself can’t send or receive messages, so the watch has nothing to mirror.
  • Software bugs or a stalled sync can stop notifications until you restart or update both devices.

What to try

  1. On the watch, open Control Center and turn off Do Not Disturb and Airplane Mode.
  1. On the iPhone, go to Settings > Apps > Messages and confirm iMessage is on.
  1. Check Send & Receive and make sure you’re signed into the same Apple Account on both devices.
  1. Restart both the iPhone and Apple Watch. Apple lists restart as a standard fix.
  1. Update both devices to the latest software.
  1. If it still fails, unpair and pair the watch again, then contact Apple Support if needed.

Quick clue

If other notifications work but Messages do not, the issue is often in the Messages/iMessage settings rather than the watch itself. If no notifications show up at all, focus first on connection, Focus modes, and notification permissions.

You can check fast

A good first test is to send an iMessage from another phone and see whether the message arrives on your iPhone first. If it doesn’t, the watch problem is probably coming from the phone or account setup, not the watch.

TL;DR: Most likely causes are a blocked notification mode, bad connection, or iMessage/account mismatch, and the fastest fix is to check Focus modes, iMessage settings, then restart both devices.