Upgrading jailbroken iphone 3gs from 3.1.2 to 4.3.3 (ofcourse jailbroken)

This guide is for upgrading jailbroken iphone 3gs from 3.1.2 to 4.3.3 (ofcourse jailbroken)

Caution:Use it at own risk and do not forget to back up everything before proceeding.

• Follow the steps in the link-

http://www.theiloop.com/how-to-untethered-jailbreak-ios-4-3-3-on-iphone-3gs-using-redsn0w/

• Download link for "redsn0w win 0.9.6rc15.zip"

http://www.mediafire.com/?seydlv958da3835

• Unlock the iphone to use with any sim card.

http://www.iphonehail.com/how-to-unlock-iphone-4-iphone-3gs-iphone-3g-with-ultrasn0w-tutorial-68.html

• Upgrade baseband to ipad 6.15(unlocking baseband 05.16.02 is not easy at this moment so upgrade)

http://jaxov.com/2011/03/how-to-upgrade-iphone-3gs-05-16-01-05-16-02-to-ipad-baseband-06-15-00/