For you're people use iOS want to have the most popular features in iPhone 4S. Now, i will go to give you a tips to have that app with this new app from redmondpie. You can have that with i4Siri Proxy Server. Take the steps and guide below..
How to take that?
Step 1: Open up Cydia and install the ‘Spire‘ tweak, developed by chpwn. More info on Spire can be found here.
Step 2: After installation, open up the device Settings application and head to ‘General >> Siri‘ and make sure the toggle is set to ‘On‘.
Step 3: Head back to the root of the Settings menu and select ‘Spire‘.
Step 4: In the Spire settings menu, populate the proxy URL field with ‘https://i4sirifree.mooo.com/’.
Step 5: Open up Mobile Safari and head to ‘http://i4siri.com/installcertificate.html‘
Step 6: Install the certificate. Activate Siri and make a request.
i4Siri Proxy Server for Spire is working in iPhone 3GS/4, iPod Touch (3rd or 4th generation), iPad 1.
Obviously for this to work, the installation of Spire and an iOS 5 capable device is required. The i4Siri server wouldn’t be possible if it wasn’t for certain open source projects which it is built upon such as siriServer by Eichhoernchen and SiriProxy by Plamoni. If you crave some Siri interaction and you have only have an older generation device, give it a shot and see what you think.