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Siri is a voice assistant feature found in the iPad (3rd generation), iPad mini, iPhone 4S, iPod touch (5th generation) and their successors. Siri has been present since iOS 5 on the iPhone 4S.

A legal port to older devices has been completed by @stroughtonsmith with the help of chpwn, and is available in Cydia as Spire. Spire is only compatible with iOS 5.0.1. There are other ports which are compatible with more iOS versions (iOS 5.1.1 through 7.x), but not all of them are reliable. Ports are not needed as of iOS 8 though as all compatible devices support Siri.

From iOS 6, Siri is supported by iPad (3rd generation) and newer, iPhone 4S and newer, iPod touch (5th generation) and newer, and with all generations of iPad mini.


Location Type Comments iOS Version
5.x 6.x 7.x 8.x 9.x 10.x 11.x
/Applications/*.lproj/*Assistant.strings Localization file Localization for Siri preferences. Yes No
/Applications/ Assistant.plist PList File Format Siri settings injection file. Yes No
/Applications/ Lock Assistant.plist PList File Format Siri Lockscreen settings injection file. Yes No
/Applications/ PList File Format Siri Restriction settings injection file. Yes No
/Applications/ Application Siri interface. No Yes No
/Applications/ Application Siri interface. No Yes
/System/Library/AccessibilityBundles/AssistantUI.axbundle Bundle Siri Accessibility plugin. Yes No Yes
/System/Library/AccessibilityBundles/Assistant-SBPlugin.axbundle Bundle Siri Accessibility plugin. No Yes
/System/Library/AccessibilityBundles/AXExtraExtras.axbundle Bundle Siri Accessibility plugin. Yes No
/System/Library/AccessibilityBundles/*-Assistant.axbundle Bundle Siri Accessibility plugins. Yes No
/System/Library/Assistant System Folder Contains most Siri plugins or functionality resources. Yes
/System/Library/CoreServices/* PNG or ARTWORK file Siri images and ARTWORK file for iOS 5 Yes No
/System/Library/DataClassMigrators/Siri.migrator Migrator bundle Siri preferences after upgrading iOS/restoring an older backup. No Yes
/System/Library/Frameworks/CoreMotion.framework/Support/EarGesture_Prototypes_Siri_X.dat System File Some resources for Apple EarPod with Remote and Mic used with Siri activation. No Yes
/System/Library/LaunchDaemons/ Daemon Handling communication between Siri (also Dictation) and Apple Server. Yes
/System/Library/LaunchDaemons/ Daemon Handling Siri plugins or trivial stuffs. Yes
/System/Library/LaunchDaemons/ Daemon Siri logging. 5.1+ Yes No
/System/Library/PrivateFrameworks/AssistantServices.framework Framework Resources for Mic sound, Location settings icon and the daemons. Yes
/System/Library/PrivateFrameworks/AssistantUI.framework Framework Resources for Siri UI. Yes
/System/Library/PrivateFrameworks/Preferences.framework/*.lproj/AssistantShared.strings Localization file Localization for "About Siri And Privacy" section. Yes
/System/Library/PrivateFrameworks/PreferencesUI.framework/5.0~Passcode Lock Assistant.plist PList File Format Siri Lockscreen settings injection file. No Yes
/System/Library/PrivateFrameworks/PreferencesUI.framework/5.0~Restrictions-Assistant.plist PList File Format Siri Restriction settings injection file. No Yes No
/System/Library/PrivateFrameworks/PreferencesUI.framework/*.lproj/*Assistant.strings Localization file Localization for Siri preferences. Yes No Yes No
/System/Library/PrivateFrameworks/SAObjects.framework Framework Resources for Siri objects. Yes
/System/Library/PrivateFrameworks/SiriClientFlow.framework Framework Siri client flow framework. No Yes
/System/Library/PrivateFrameworks/SiriCore.framework Framework Siri core framework. No Yes
/System/Library/PrivateFrameworks/SiriTasks.framework Framework Resources for Siri's operations. No 8.2+ Yes
/System/Library/PrivateFrameworks/SiriTTS.framework Framework ? No Yes
/System/Library/PrivateFrameworks/SiriUI.framework Framework Resources for Siri UI/Artwork for iOS 7+ No Yes
/System/Library/PrivateFrameworks/SiriUICore.framework Framework Core resources for Siri UI No 8.2+ Yes
/System/Library/PrivateFrameworks/VoiceTrigger.framework Framework Resources for "Hey Siri" feature No Yes
/System/Library/PrivateFrameworks/VoiceTriggerUI.framework Framework UI-based Resources for "Hey Siri" feature No Yes
/System/Library/PreferenceBundles/Assistant.bundle Preference Bundle Siri settings. Yes
/System/Library/SpringBoardPlugins/Assistant.uibundle SpringBoard Plugin Mainly handling Siri UI in iOS 6, unusual for iOS 7+ No Yes
/System/Library/UserEventPlugins/AssistantUEA.plugin System Plugin Siri logging. Yes No


Additional Capabilities

In iOS 5 and 6, additional keys in the capabilities section of /System/Library/CoreServices/ would be added to enable Siri:

<key>siri-gesture</key> // Raise to speak, activate Siri when you raise your phone to ear (iOS 6)

Since the Model definition file is move along in iOS 7, in a DeviceTree instead. MobileSubstrate Hooking is required in order to inject these capabilities. (MGGetBoolAnswer(CFSTR("assistant")) for example)

Additional Filesystems

The installation of Siri (its filesystems) on other devices requires access to the iPhone 4S or supported devices filesystem, to copy over the files above to a jailbroken device running the same iOS version, with correct files permissions.

For iOS 5, the stock assistant images from the iPhone 4S are only available in Retina size. On non-Retina devices (iPad, iPad 2 and iPhone 3GS), interface features may look different and the theme Siri Graphics for iPhone 3GS and iPad in Cydia needs to be installed.

Installing on iPad models running iOS 5 causes buggy interface, because the system usually forces the assistant window as full-screen. In this case, you have to manually edit the images to fix. Differently on iOS 6, assistant images are available both in Retina and non-Retina devices (for iPad mini), so you could copy the non-Retina images or artwork file from the non-Retina jailbroken devices.

Shared Cache Injection

One last thing you have to do is dyld_shared_cache injection, according to stroughtonsmith 's tweet. Because some of Siri binaries are there, without them mean Siri won't work.

  • Copying /System/Library/Caches/ from Siri-capable devices.
  • Placing it in some directory in your target devices, take note for the location.
  • Editing /System/Library/LaunchDaemons/ using some good text editor, by adding these section:
    <string>THE FULL LOCATION OF YOUR DYLD SHARED CACHE HERE (FOR EXAMPLE: /var/mobile/folder_with_dyld_shared_cache_inside)</string>

For iOS 6 and 7, both and deamons must be injected the code too.

  • The cache we inject is commonly from Apple A5 devices, so the system won't be able to find the compatible graphics driver binary for Apple A4 devices and causes massive slowdown and animation lag if the target devices aren't iPad 2 or iPad (3rd generation) (A5 devices) as they use the same driver. You can find the A4 Graphics driver named "IMGSGX535GLDriver" from Xcode-inside location: /Applications/[THE iOS VERSION NUMBER].sdk/System/Library/Extensions/IMGSGX535GLDriver.bundle/IMGSGX535GLDriver and place into your target devices at /System/Library/Extensions/IMGSGX535GLDriver.bundle directory. This method seems to be impossible for iOS 7 however, as the SDK no longer included the graphic binary.
  • Save it and reboot the devices to take effect. Wrong cache location causes infinite SpringBoard crashing.

Purpose for iOS 5 devices

  • Add missing binary at /System/Library/Assistant/UIPlugins/SpringBoard.assistantUIBundle/SpringBoard

Purpose for iOS 6 devices

  • Add missing framework binary at /System/Library/PrivateFrameworks/AssistantUI.framework/AssistantUI

Purpose for iOS 7 devices

  • Add missing framework binary at /System/Library/PrivateFrameworks/AssistantUI.framework/AssistantUI (Applied to and SpringBoard)

Connecting to Server

Holding down the home button for a second should activate the Siri tray at the bottom of the screen (iPhone, iPod and iPad running iOS 5), or at the area close to home button on screen (iPad running iOS 6+), but saying anything will make it say it can't connect because the server rejects any query from these unsupported devices. This is due to the device requiring an identifier that the Siri servers generate every 24 hours for Siri-capable iDevices.

Changing Server

SiriProxy can overcome the server connection issue if you have access to Siri capable iDevices. The server that Siri sends its data through can be changed in a number of ways.

The most reliable method is to use a DNS server, as demonstrated by plamoni.

An easier approach is to edit the file in the device's /var/mobile/Library/Preferences folder. It can be changed either on a jailbroken device with iFile, or via an iPhone backup reading utility. The hostname string simply needs to be replaced with the URL of your SiriProxy (i.e. your computer's IP address). This method could also allow for your SiriProxy to work outside of your Wi-Fi network, if you set up forwarding for port 443 to your computer in your router, and use your external IP address. However, some routers don't do port forwarding inside of their network, so you would need to change this setting yourself when you arrive or leave home. A static IP or dynamic DNS address (such as one from Dyn) is recommended.

The /etc/hosts file on a jailbroken device can also be modified. This can also be used externally, like the above method, though domain redirects are disallowed in host files, so a static IP is required. For instance, if you have a server which has the IP, enter this on a new line:

Make sure there is at least one blank line at the very end of the file, or this will fail.

Bypassing Authentication

Alternative to dealing with SiriProxy, it's also possible to trick the Apple server that you are using a Siri-capable device by simply faking device model that the system would include as a "header" to send to the Apple server (method -[ADAceConnection _startConnection] does that). It could be achieved this way: SiriAuthFix.


See Also