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How To Install Jailbroken Apps On iPhone OS 3.1 Firmware

You might have noticed that after upgrading your iPhone to firmware 3.1, all (apps that you have installed manually outside from App Store) Jailbroken apps have stopped working even if your re-install them. So how to run these Jailbroken apps? Jailbroken apps will not work on iPhone OS firmware 3.1 until you patch MobileInstallation file on your iPhone. Here is a step by step guide through which you can unlock Jailbroken apps. You can jailbreak iPhone firmware 3.1 from here and unlock it from here before you may proceed to the procedure below.

How To Apply Cydia MobileInstallation Patch

  1. Go to "Cydia"
  2. Click on "Manage" tab on the bottom
  3. Click on "Sources" as shown in the screenshot below:
  4. Cydia Mobile Installation Patch

  5. Click on "Edit" and then on "Add". You will be prompted to enter a url source as shown in the screenshot below. Type "" and click on "Add Source"
  6. Add

  7. Upon adding the Hackulous address, Cydia will now automatically update your sources by following a series of automated steps
  8. Updating Sources

    Reloading Data

  9. After installation is completed. Search for "AppSync for OS 3.1" in Cydia and install this application. This app will automatically patch your mobileinstallation file
  10. AppSync for OS 3.1

Yeah! Now you can easily install / run Jailbroken iPhone apps on iPhone OS firmware 3.1. Enjoy :D

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    Sicknote11 years, 8 months ago

    I have used this app but still cant get them to work on my phone?
    Can anyone help?

    john12 years ago

    Thanks for the tip man. But could you tell me if the apps that was already install on OS 3.0 would automatically comes back on the phone? thanks in advance.