How do I fix SMS not sending?

How to Fix it: Text messages not sending, Android

1. Check your network connection. …
2. Force stop the Messages app. …
3. Or restart your phone. …
4. Get the most up-to-date version of Messages. …
5. Clear the Messages cache. …
6. Check that the issue isn’t with just one contact. …
7. Verify that your SIM card is properly installed.