Apple's decision to make Siri an exclusive feature that belongs to the recently released iPhone 4S has been question quite a lot ever since Siri was announced. At first we all thought it had to be the iPhone 4S' better, faster and improved hardware, but as it turns out, people have successfully ported Siri to fully and flawlessly (with some mic hiccups on the iPod's side) work on all current iOS 5 devices including the iPhone 4, iPhone 3GS, iPad, iPad 2 and the iPod Touch 4G. Jailbreaking is still required though. Here's a handy guide on how to install Siri on the iPhone 4 and iPod Touch if you're feeling adventurous, or possibly betrayed. Just goes to show you that Apple did everything to entice users to jump ship and get the iPhone 4S with its voice assistant genie.