'Why is my iPhone not sending messages?': How to troubleshoot iPhone messaging issues

When troubleshooting an iPhone that is not sending messages, first make sure your phone has service, then proceed with these tips.

How to fix iMessage activation issue on iOS 26

iPhone users on iOS 26, iMessage activation may be blocked by an inactive SIM — here's how to fix it. Some users are finding ...

iOS 26: Fix iMessage Not Working With Your Phone Number

After updating to iOS 26, some people may find that iMessage no longer activates with their phone number. Apple has released ...
PCMag UK on MSN

iMessage Not Working on iOS 26? Apple Explains How to Fix It

Apple says the issue may stem from having an inactive SIM with the same number as your active SIM. To fix it, remove the inactive SIM and activate iMessage again.