What is the best free way to jailbreak your iphone 3gs 6.1.2 ?
Start by downloading the Evasion program using the link provided at http://lifehacker.com/5771943/how-to-jailbreak-your-iphone-the-always-up+to+date-guide-[ios-61]. Once you've connected the iPhone to the computer, click the Jailbreak button in the Evasi0n app window and wait for the jailbreak process to continue.
Check out www.jailbreaknation.com for all your jailbreaking needs. It will direct you to the information and software you need to jailbreak your device. Be sure to back up your data first. Have fun and enjoy.