How to call for free (If you have internet in mobile)

You can take the least amount of minutes needed and instead call from Skype. It just costs $3 a months for unlimited calls within the U.S! If you have internet service, you can install Skype on your mobile and then call from the Skype application instead of your phone company. Why waste 20 bucks on increasing your minutes while you can get unlimited calls for $3 a month?
Go to www.skype.com in your mobile and download and enjoy!
And if you don't want to waste that $3 in Skype, that's fine too. As long as you are in Skype and the person who you're calling is also in Skype, its totally free! No need to pay even that $3!