Yes! You can now port Siri voice assistant on your jailbroken iPhone 4 or iPod touch 4G without having iPhone 4S in hand and without buying any Siri proxy server. Check out this step by step video guide on how to install Siri on your non-iPhone 4S device.
Note: Since the server is overloaded, you may incur some connectivity issues, however.
Here is how to install Siri on iPhone 4, iPod Touch 4G and iPad 2
Step 1: Jailbreak your iPhone 4 or iPod touch 4G using Redsn0w on 5.0.1
Step 2: Launch Cydia and add the Source repo.siriport.ru to Cydia
Step 3: Install “Siriport”
Step 4: Reboot
Step 5: Download iPhone 4S certificate file by visiting siriport.ru/1.crt (or cydiablog.com/siri/. Email the certificate file to yourself and then open it on your device from your email.
Step 6: Reboot
Step 7: Activate Siri and say “Hi Siri” Siri won’t work, wait 1-4 minutes and try again. (Say “Hi Siri” again)
Step 8: Repeat step 6 until Siri is activated
Note:NOTE: SiriPort has updated to version 1.4-0, perfectly supports iPhone 4, iPod Touch 4G and iPad 2. Clicking on this link you can check if the servers are running, and number of people using the port: Server Status SiriPort
After Getting Siri on your non-iPhone 4S device you may install any of Siri jailbreak Apps that will supercharge your Siri experience.
Disclaimer: We haven’t test this on our device yet and we should not be held responsible if something goes wrong. However, the some jailbreak blog like Cydiablog has verified it did work. So please consider the risk.