Step 1) – The first thing you will need to do is Jailbreak your iPhone, iPod Touch or iPad running the iOS 5.o or the iOS 5.0.1 firmware. To do this please visit iJailbreak’s official Jailbreak Section where you can find an applicable Jailbreaking guide for your iPhone, iPod Touch or iPad.
Note: At this time the Spire Cydia tweak is not compatible with the Semi-Tethered iOS 5/iOS 5.0.1 Jailbreak.
Step 2) – Once you have a Jailbroken iDevice running the iOS 5.0/iOS 5.0.1 firmware you will need to launch Cydia from your SpringBoard (homescreen).
Step 3) – With Cydia up and running you will need to go into the Search tab and type in:
Step 4) – When you see Spire come up on Cydia’s search results you will need to click on it, read through the warnings/descriptions, and then install it to your iPhone, iPod Touch or iPad.
Note: The Spire Cydia tweak uses about 100 MB of data, so please connect to Wi-Fi before installing.
Step 5) – Once the Spire Cydia tweak has been installed to your iPhone, iPod Touch or iPad you will need to reboot and then obviously boot tethered using a Jailbreaking tool like RedSn0w.
Step 6) – Upon rebooting your iDevice into a usable state you will need to launch the Settings.app and go into the Spire tab.
Step 7) – From the Spire tab in the Settings.app you will see a text area to enter a Proxy Host. This can be a proxy host created by you (as explained in the Requirements section at the top of this how to guide), or a 3rd party proxy host that you have access to.
Step 8 ) – With the Spire Cydia tweak now configured properly you should be able to use Siri on your older iPhone, iPod Touch or iPad.