Installing Siri on iPhone 4 without Proxy

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I tried this and it works 100% but Siri's response is slow and sporadic (sometimes).

Source: http://www.iphonestuffs4u.com/how-to-install-siri-on-iphone-4-ipod-touch-4g-without-proxy/

1- Jailbreak your iPhone 4 on iOS 5.0.1 and add repo.siriport.ru as a repo.
2- Install Siriport from Cydia and reboot your phone.
3- In order to get Siri working, you need an iPhone 4S certificate. You can get that by pointing your browser to siriport.ru/1.crt
4- Install the certificate and Activate Siri from Settings | General | Siri
5- Reboot the phone
6- Enable Location Services for Siri
7- Close all the apps running in the background
8- Go to the home screen and scroll to the right to go to the Spotlight search, there you will get the usual Keyboard with a new Microphone icon.
9- Click on the microphone icon and say "Hi Siri". You will see that the phrase "Hi Siri" will have been written in the text box.
10- Now, press and hold the home button for Siri app to work and say again: "Hi Siri". Now the surprise, you will get: "Hi, "
11- Enjoy.