How to make free call from PC - Skype

Skype is a software by which you can make call all over the world that to free.
It is free for Skype to Skype - Calls, Chat, Video Calls and Video Constance
Even you can make call from PC to Phone but that is chargeable
Skype can be used on Phone, PC, Tabs.

Log in to skype.com and Reg for it.
Download the software for your PC, Tab, Mobile.
Login in and add your friends and even you can renew this account and make call to phone Numbers.