Original Source: How To Install Siri on iPhone 4
With the advent of the Absinthe 2.0 untethered jailbreak for IOS 5.1.1 devices, the number of jailbroken devices has risen to one million. Probably the biggest reason to jailbreak your iPhone, iPod Touch or iPad is to get Siri working on it. Until recently the most popular method of installing Siri on a Jailbroken iOS devices, was Spire, which is no longer compatible with the iOS 5.1.1 firmware.
Luckily for the older devices there is still hope in another new tweak. Siriport will allow you to get Siri on your idevice without the need of a proxy server like Spire. Thus enabling the user to use Siri on the iPhone 4 (GSM, CDMA), iPhone 3GS, iPod Touch 4G, iPod Touch 3G and iPad 1G running the iOS 5.1.1 without proxy servers of 4S activation keys.
The recent update of SiriPort, version 5.1.1-3, enables better connectivity and responsiveness. By far Siriport is the tested best option to enable Siri on your old IOS device. The following tutorial will teach you how to get Siriport up and running on your iPhone 4/3GS, iPod Touch 4G/3G or iPad 1G running the iOS 5.1.1 firmware.
Install SiriPort on iPhone, iPod Touch, iPad
WARNING: Before proceeding backup your IOS device. Although there is a high success rate of this hack it has been known to lock the device in an endless boot loop, forcing a factory reset to be exercised on the idevice. The former happened to me while loading Siriport on my iphone 4 so proceed at your own risk.
Step 1) – The very first step is to Jailbreak your iPhone, iPod Touch or iPad Untethered on the iOS 5.1.1 firmware. Absinthe 2.0 may be used for this.
Step 2) – The official Siriport repo comes next. To add this repo launch Cydia, then Manage tab>sources section>Edit > Add and add the repo address below in the dialogue:
Step 3) – Once the repository is added then type in Cydia’s search tab:
Step 4) – In the search results look for Siriport (original) and tap on it to install it onto your IOS device. A prerequisite to consider it that it is a fairly large package (100mb) so ensure a good Wi-Fi connection before beginning installation.
Step 5) – Once Siriport is successfully installed close out of Cydia and launch mobile Safari and goto the following address:
Step 6) – At the above given URL, you will be prompted to download a certificate file that you shall have to email to yourself and open in your device to install. Now that the certificate has been installed to your iPhone, iPod Touch or iPad, you will need to reboot your device.
Step 7) – Next simply activate Siri by long pressing the Home button and say “Hi” or “Hello Siri”. If you do not get a reply then you must reboot your device and repeat this process until Siri replies. When Siri responds with a greeting Siriport has been correctly configured onto your older generation IOS device running 5.1.1 firmware.
Note: Siriport is being used by almost every older generation IOS device owner so if you do not get a reply from Siri then just keep trying, you are bound to get in as the servers are just overloaded.
If you acted correctly as instructed above then you have successfully gotten Siri working on your iPhone, iPod Touch or iPad running the iOS 5.1.1 firmware. Please share any and all comments about your experience in setting up and using Siriport in the Comments section below.
How To Install Siri on iPhone 4