How To Install iOS 6 Siri On iPhone 4 And iPod Touch 4G

Requirements:
A jailbroken iPhone 4 or iPod touch 4G running iOS 6 (currently a tethered jailbreak).
Step 1: The first and potentially most important step is to get access to the required Siri port files. Open up Cydia on your iPhone 4 or iPod touch 4 and head to the section where it allows you to add a new repository (Manage > Sources > Edit > Add). In the resulting pop-up box; add the following repo address and confirm the addition: repo.siriport.ru
Step 2: When the repository has finished reloading its data; search for the SiriPort (original) iOS 6 package and install it to the device through the usual manner.
Step 3: When the package is installed and the device has rebooted, navigate to Settings.app and find the SiriPort.Ru Original option. Tap on this option and select the Install Certificate to install the require verification certificate to enable communication between the device and the Siri server.
Step 4: Installation process is now complete. Invoke Siri and say anything to start using it.
Note: It may take a while for it to respond to your queries. Keep trying until you here back from Siri.