Skype offers a range of services. One of them is a free service. I use that service to take lessons via videocalls from Italki teachers. The free service allows two people with computers, connected to the Internet in any way--WiFi or cable--to have spoken conversations with each other and, if they have a webcam and fast service, have videocalls. You access each other by means of a "Skype address" which, like an email address, is a combination of letters and numbers you choose yourself. You can only talk to other people that have signed up and have Skype addresses. They hope you'll buy one of their paid services. When you sign up, they force you to answer "no" a couple of times if you don't want the paid services. For a monthly charge, they offer an extra service that allows you to connect to peoples' telephones via their telephone number. If you buy that service, then you can use Skype to call someone who doesn't have Skype--anyone with a telephone, whether or not they are connected to the Internet.

WiFi

just Wifi:)

yes, it is free

It is free, right?