Users have reported that all un-official Siri ports are broken after jailbreaking the device with Absinthe 2.0 or 2.0.1; and even worse is that the Spire tweak doesn’t work on jailbroken 5.1/5.1.1 firmware anymore. Spire tweak developer Grant Paul (aka chpwn) clarifies that it’s impossible to update Spire to support iOS 5.1+ because Apple does not host a decrypted copy of Siri for iOS 5.1. But this is not the case for the ports which doesn’t require installing Spire tweak.
First legit Siri port, provided by Russian developers has just released SiriPort (Original) for iOS 5.1.1 that brings Siri on all iOS devices jailbroken with Absinthe. You can now port digital voice assistant on your jailbroken iPhone 4 (GSM, CDMA), iPhone 3GS, iPod touch 4G and iPad without having iPhone 4S in hand and without buying any Siri proxy server.
We have tested the port and it works great, on our first attempt we had an answer and Siri worked perfectly on our iPhone 4, so we recommend you to give a try. After the guide is online, the server will definitely be overloaded and you may incur some connectivity issues. Doesn’t work on iPad 2, iPad 3 (The New iPad), iPod touch 3G
Below is the step by step guide on how to install Siri on your non-iPhone 4S device.
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. 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
Let us know in comments, if it works for you or not. Follow @JAlLBREAKS for more on Siri port.
[UPDATE 1]: The method listed above may not work. The developers have re-written the Siri server and certificate files have been changed. Please follow the Guide to install Siri with SiriPort (Original) 5.1.1-3 on iPhone, iPod Touch.