Messenger video calls

Hi aris1982,

To clarify, are you using FaceTime to make the calls, or are you using Facebook Messenger? If it's Facebook Messenger, we would suggest contacting the app developer for assistance:

How to contact an app developer - Apple Support

If this is occurring with FaceTime, you can try the suggestions here for troubleshooting that may help to resolve the issue:

If you can't make or receive a FaceTime call on your iPhone or iPad - Apple Support

Cheers!

Hello aris1982,

If FaceTime only works while using a Wi-Fi connection, you'll want to turn on the cellular data for it.

Go to Settings > Cellular, then scroll down the page and turn on the button next to FaceTime.

View or change cellular data settings on iPhone

Cheers!