You can now install Siri on your iPhone 4, iPhone 3GS, iPad 2 and first generation iPad without using third party proxy server address. This can be made possible by using a combo applications which has just been released in Cydia store – AssistantConnect4S (email Siri auth to non-iPhone 4S devices) and AssistantConnect (use Siri auth from AssistantConnect4S device).
In order to install Siri you must first install AssistantConnect4S cydia tweak that allows iPhone 4S owners to email their authenticated certificate file via email. It actually download all the required data from your iPhone 4S for Siri to work on old generation iOS devices. Developer has warned users to be careful and not to send cert file to more than 5 people in order to avoid penalty or complete ban. This jailbreak app only works in conjunction with Spire jailbreak tweak developed by chpwn and AssistantConnect app.
The next step is to install the Spire tweak on your iOS 5.0.1 (or iOS 5.0) jailbroken iPhone 4, iPad, iPad 2, iPod touch 4G, if you haven’t already. Then install AssistantConnect cydia app on your iOS device on which you wish to install Siri without proxy. Both AssistantConnect4S and AssistantConnect cydia tweaks are available for free download under bigboss repo.
Alternatively, if you are unable to find them in Cydia list or bigboss repo, you can download AssistantConnect4S .deb file and AssistantConnect .deb file and install it on respective devices via iFile or OpenSSH.
If you don’t have iPhone 4S, you can request your friend for it. Else you can try other alternative to install Siri on non-iPhone 4S device. A possible and safe alternative is to use Sara tweak. You can however use this method to get native Siri assistant on iPhone 4. After Getting Siri on your iPhone 4 or iPod touch 4G, you may install any of the 10 Siri jailbreak Apps that will supercharge your Siri experience.
Let us know if you face any difficulty in setting up Siri on your iPhone, iPad or iPod touch, sound off in comments. Follow @JAlLBREAKS for more on Siri.
[UPDATE 1]: It seems that you must configure following URL in the settings of Spire tweak.