Apple Siri that came integrated with iPhone 4s created a bad feeling for those owning iPhone 4. Apple doesn’t seem to make Siri available to earlier versions of iPhone and iPods.There were many rumors like “Siri needs A5 Chip to work”.But the truth is A5 is not a must for Siri to Run.It could run on iPhone 4 and iPod touch 4G.Many developers and hackers tried to hack the app to make it run on iPhone 4.But failed in the part where, it needed authentication from Apple servers to recognize voice.
The developers are not going to release their hacked version of the app to public.This is because of the legal reasons which would lead them into trouble if they release the repacked Apple Code.
According to the developers, Siri is not So good on iPod Touch as the microphone on it is not so efficient.But on iPhone 4 it works as good as it does on an iPhone 4S.
Though a solution has been found to run Siri on previous version hardware, still due to legal issues, you may not get it until Apple makes an official release to all devices.If you really want to try it, better get an iPhone 4S.