my iphone x max i cant use the facetime

Hello jaykid288,

Let's check some settings on your iPhone for FaceTime.

1. Go to Settings > FaceTime > and make sure FaceTime is on.
2. Turn FaceTime off and on again.
3. Check under Settings > General > Date & Time to verify Set Automatically is on.
4. Restart your iPhone
5. Update your iPhone, iPad, or iPod touch

For more details, follow the steps here: If you can't make a FaceTime call on your iPhone, iPad, or iPod touch

If you can’t find the FaceTime app or need to restore it on your iPhone, iPad or iPod touch, learn what to do.

Make sure that your device supports FaceTime. FaceTime isn’t available or might not appear on some iPhones and iPads purchased or used in Saudi Arabia, Pakistan, and United Arab Emirates, including Dubai. However, with iOS 11.3 or later, FaceTime is available on iPhone, iPad, and iPod touch in Saudi Arabia. And with iOS 12.4 or later, FaceTime is available on iPhone, iPad, and iPod touch in Pakistan.

Go to Settings > Screen Time > Content & Privacy Restrictions > Allowed Apps and make sure that FaceTime and Camera are turned on. If you have Screen Time turned on for your Camera, you won't be able to use FaceTime.

Search for the FaceTime app in Spotlight or using Siri. If you or someone else removed the FaceTime app, you might need to restore it.

Update your device to the latest version of iOS or iPadOS.

If you still can’t find the FaceTime app, back up your device using your computer or iCloud, then restore your device. After you restore your device, set it up by selecting your region and language. Then restore the data using your computer.

Find or restore a missing FaceTime app

Cheers.