iMessage not recording voice messages

Hello alessiap_,

Thanks for reaching out to the Apple Support Communities. We understand you are experiencing some issues with Messages and recording a voice message. We are happy to help provide some guidance.

It sounds like you've done some good isolation steps so far to test your microphone to ensure its working within other apps. If you haven't tried already, try restarting the iPhone and testing for this again:

Send photo, video, or audio messages on your iPhone, iPad, or iPod touch

When did you notice this behavior begin? Was it after any sort of change or update to the device? We would also recommend updating your iPhone to the most recent iOS version that is available for your device. Take a look at how to update here:

Update your iPhone, iPad, or iPod touch

Keep us updated on how it goes. We hope this information helps.

Cheers.

Thanks for the update on this. When you tried restarting the iPhone, did you do a regular restart or a force restart? If you haven't tried force restarting, give that a try as the next step to see if the issue persists:

Force restart iPhone

We would also recommend following the guidance outlined in the following helpful article to force close an app if its not working properly, as well as removing and re-adding the app. We would recommend making sure you have a good backup of your data before removing and re-adding the app:

If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open