For past few months many hackers and jailbreaking experts tried to make Siri work in the devices released before iPhone 4S.
There were various news reports and online videos in this regard. Then came the news that Apple had tried to test Siri with older devices but Siri did not work.
A hacker proved Apple wrong by claiming that most of the Siri features worked in iPhone 4, leaving Apple puzzled. Apple decided to test Siri on iPhone 4 once again. Apple had declared that older Apple devices would not carry Siri.
Eric Day, who had invented the new application Siri0us has pulled it from Cydia, probably due to issues related to copyright.
Some people think that Siri0us can do everything that Siri can. However, this is not true.
For past few months, many hackers and developers have been trying to port Siri into older Apple devices.
Most of the features of Siri worked in iPhone 4 and some also worked in iPhone 3GS after a little jailbreaking. So far it has been seen that as a technology, Siri does not require the A5 processor of iPhone 4S.