How to jailbreak my iphone 4s for free?

Okay so i've been trying to find a way to jailbreak my phone but i have ios 6.1.3.is there any way that i can like reverse the update or something? I'm trying to restart it but itunes is saying i have to update my software first before i can restart the phone. BUT ITS TAKING FOREVER! I have ATT if that makes a difference

There's no jailbreak for the iphone 4s on 6.1.3.
won't be until after ios 7 is released 6-9 months before a jailbreak will be avail

Any legit Jailbreak is free, go here http://www.jailbreak-me.info/
enter your phones info and it will tell you exactly what program to use.
Then you should get it unlock and go to the site below for free tmobile service

https://www.solavei.com:443/en/CHOJINKI
https://www.facebook.com/.../masahonin