Use FaceTime on your iPhone - Apple Support

Make video or audio calls with FaceTime.

View participants in a grid layout in FaceTime on iPhone - Apple Support (MN)

iOS 15: How to FaceTime Android Users - MacRumors

How to Use Apple FaceTime Like a Pro

Find your apps in App Library on iPhone - Apple Support

iPhone User Guide - Apple Support

Make your iPhone your own - Apple Support

How FaceTime on Apple TV will work - and more on other tvOS upgrades coming soon

Make and receive FaceTime video calls on Mac - Apple Support

Apple iPhone 15 Pro - FaceTime - AT&T

If you forgot your Apple ID - Apple Support

Use AssistiveTouch on iPhone - Apple Support

Use Search on your iPhone, iPad, or iPod touch - Apple Support (MT)

Use Face ID - Apple Support