We have previously highlighted the exploits of the iPhone hacking community in its attempts to break Siri's exclusivity to the iPhone 4S. And while various device modders have been successful at getting the application itself ported over to devices like Apple's iPhone 4 and iPod touch, they didn't manage to address the elephant in the room: How to get Siri to work with Apple's servers, which don't seem to allow requests from unauthorized (non-iPhone 4S) devices.
Two hackers have since discovered the secret Siri sauce, but neither has spilled the beans as to exactly how their non-iPhone 4S Siri app works. According to Steve Troughton-Smith, however, the tweak was built using a single line of code and "a ton of filesystem changes." And as long as a user first jailbreaks his or her device before installing the to-be-released tweak, Siri is unlocked with no restrictions on its use: It works with the same speed and speech recognition as its iPhone 4S counterpart.