how to activate 3GS Before jailbreak 6.1
First you need


Redsn0w 0.9.15b3



http://www.mediafire.com/?pci6prfvux98036


Second
We Need Firmware 5.1.1
And We Will Mark In Redsn0w
Deactivate Like This Pic

assetphp?fid107823&ampuid163983&ampd1360265349

Now Jailbreak Your Iphone With Evasion-1.0

http://www.mediafire.com/?7nfs3998bj73pjw

After Jailbreak You Need UltraSn0w Source

To Unlock Your Iphone 3GS

Here

Randly