Why can't I FaceTime certain contacts?
I usually only FaceTime my mother but have noticed that most of the contacts in my phonebook have FaceTime "greyed" out. I know that most of them have iPhones but have every setting for FaceTime turned on. Is there a way I can make FaceTime available for everyone? Thanks in advance for your replies
It's an iPhone 8 with the latest IOS.
[Re-Titled by Moderator]
iPhone 8, iOS 11.2.5