Get started with FaceTime on iPhone - Apple Support (CA)

Get started with FaceTime on iPad - Apple Support

Add or remove your phone number in Messages or FaceTime - Apple

Request a refund for apps or content that you bought from Apple

What to do before you sell, give away, or trade in your iPhone or

Mark a device as lost in Find My on iPod touch - Apple Support (CA)

Use FaceTime on your iPhone - Apple Support (CA)

About notifications - Apple Support (CA)

Move from Android to iPhone or iPad - Apple Support (CA)

iPhone User Guide - Apple Support