There's one limitation, though. Android and PC users can't start a FaceTime call on their own. They'll need an Apple user to ...

Here's a step-by-step guide on how to initiate FaceTime calls to Android users if you're an iPhone user, and how to receive FaceTime calls if you use an Android phone.

If you can place or receive FaceTime calls to other devices and your own are still failing, check to see what information you’re using to try and connect.