Good News   Facetime for Android Calling Features has been mentioned.
Facetime for Pc Download

Can you use facetime in pc?

yes, facetime is actually pre-installed in macbook or mac osx.
facetime can be used in windows as well with few tweaks and tricks.
you can not do video calls in facetime if your front camera is not working. you must need external camera (web cam) if you're using personal computer.
group calling from facetime pc is not yet possible due to lack of development.

 How To Dial Number in Facetime via PC?

It is very easy to dial number in facetime as it has default dialer in osx Mac Operating System.
Step 1: Click on the following icon in your system tray. ""
Step 2: You can see the contacts as well as dialer on the right side at the central panel.
Step 3: Select Audio / Video Calls and click on your desire way to call with your friends.