You can now have Siri on iPad 2 along with other jailbreak tweaks like SiriToggles, and updates to Hands-Free Control to improve its functionality. What you need to do isn’t easy. You need to set up your own proxy server as well as edit your iPad’s file system.
You had been shown earlier how to install Siri on iPhone 4. To run it on iPad 2 there are some additional points to remember. First of all you are going to require a jailbroken iPad 2 running iOS 5.0.1 and Siri Proxy. You can install Siri Proxy using Ubuntu as it’s free and reliable enough.
Important: This could cause your iPad to go into “iPhone mode” but that can be fixed.
Download and install iFile from Cydia. Open iFile and navigate to /System/Library/CoreServices/Springboard.app/. Once there tap and open the K.plist file (K93AP.plist, K94AP.plist, etc) with the Property List Viewer.
Tap capabilities, and scroll down until you see iPad. Switch iPad from On to Off and tap Done. Restart your iPad.
Once back up, open Cydia, and install Spire, it will ask you to reboot again.
Once back up, go back into /System/Library/CoreServices/Springboard.app/ using iFile. Once there tap and open the K.plist file (K93AP.plist, K94AP.plist, etc) with the Property List Viewer.
Tap capabilities, and scroll down until you see iPad. Switch iPad from Off to On and tap Done and exit iFile.
3) Download an install Dropbox; log in, and download the ca.pem file that was placed there in the initial Siri Proxy Tutorial. (Select it, copy link, paste link in Safari Browser). The Install Profile window should open, select Install, and tap Done.
4) Open iFile and navigate to /etc/. Tap hosts and choose Text Viewer. Tap Edit in the upper-left hand corner, and add the following line:
Tap Save then tap Done.
5) Open the Settings app and go to General > Siri. Enable Siri.
6) Open the Settings app and under Extensions select Spire. Type the following in the Proxy Host field:
7) Open iFile and navigate to /var/mobile/Library/Preferences/. Once there tap and open com.apple.assistant.plist
Tap on Accounts > Choose your hex key (this will be a random alphanumeric value) > and add the following three fields utilizing the “+” sign in the bottom right-hand corner, then tap Done:
8) Open Settings > Wi-Fi > and Select the right blue arrow corresponding to your Wi-Fi connection. Change the DNS field to the IP address of your Siri Proxy Server. Again, if you need help with this, get familiar with our original Siri Proxy Tutorial.
9) Exit Settings, and test Siri by pressing and holding the Home button. You should also see feedback in the terminal window of your Ubuntu server, just like you did when running Siri Proxy on the iPhone 4S, or iPhone 4.
You can even install some cool plugins like Hands-Free Control or SiriToggles as they work well on iPad 2.