iMessage is not working

Hi! Could you provide a few more details about what’s happening with iMessage? For example, are your messages failing to send, appearing as green SMS bubbles instead of blue, or is iMessage failing to activate altogether?

In the meantime, you can try a few basic troubleshooting steps:

1. Check that your device has a working Wi-Fi or cellular data connection.
2. Go to Settings > Apps > Messages and confirm that iMessage is enabled.
3. Under Send & Receive, verify that your phone number is selected.
4. Restart your iPhone and check for any available iOS updates.

Also, does the issue affect all your contacts or only certain conversations?

Knowing exactly what’s happening, along with any error messages you’re receiving, will help narrow down the cause.

Start here:

https://support.apple.com/en-us/119859

Then follow up with any messages you are seeing and what happens when you try.