Using Odysseyn1x

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checkra1n is a semi-tethered jailbreak, meaning it requires a PC to re-apply the exploit after a reboot. Click the link to learn more.

Odysseyn1x is a live bootable Linux environment that allows you to quickly run checkra1n on a compatible device. checkra1n is capable of jailbreaking millions of iOS device on firmwares 12.0 and above.

Once the exploit is installed, you will have to install a package manager. By default, checkra1n only supports the “Cydia” package manager, however this is outdated and slow.

Instead, we’ll be using a the odysseyra1n script to install the “Sileo” package manager, which provides a more modern experience.


  • 512MB or greater USB Drive
  • The latest version of Odysseyn1x
    • For 64-bit computers, download the “AMD64” version
    • For 32-bit computers, download the “i686” version
  • balenaEtcher

If you’re migrating from unc0ver to to checkra1n, you must follow Removing unc0ver before proceeding.

Flashing Odysseyn1x

  1. Download and install balenaEtcher
  2. Click Flash from file
  3. Select the odysseyn1x .iso file
  4. Click Select target
  5. Select the USB drive you would like to boot from
    • This USB drive will be completely erased
    • Ensure you back up all important data beforehand
  6. Click Flash!
    • Do not remove your USB Drive until the process has completed
  7. Once the flashing has completed, reboot your computer
  8. Go into your BIOS settings and disable Secure Boot, then enter the boot picker and select your USB Drive to boot from
    • This is different for every computer
    • Search your PC or motherboard brand to find out how to get to your BIOS settings if you are unsure

Running checkra1n

  1. Once you have loaded odysseyn1x, select checkra1n
  2. Click Start and follow all onscreen prompts
  3. You will now be presented with instructions in how to reboot your device into DFU mode, click Start to begin
    • Follow the instructions until your device reboots to a black screen
  4. Once your device boots, you can quit checkra1n, but do not shut down your computer

The Odysseyra1n script

The following steps only need to be performed once and are optional but highly recommended for a smoother experience and modern bootstrap.

  1. Unlock your device
  2. Ensure that your computer is trusted by your device
  3. Select Odysseyra1n in Odysseyn1x
  4. Sileo should install to your device
  5. Do not close Odysseyn1x as you will need to re-jailbreak in a few minutes

After installing Odysseyra1n you should not install Cydia from the Loader app, but rather from the Procursus repo within Sileo.

You should now be jailbroken with Sileo installed on your home screen. You can use Sileo to install tweaks, themes, packages and more.

Before you can start installing anything else, you first need to install a few necessary programs.

Installing packages

  1. Open the newly installed Sileo application
  2. Go to the “Packages” tab
  3. Select the filter button next to “Name”, then select “Developer”
  4. Tap “Upgrade All” if there are any updates
    • Do not install yet
  5. Go to the “Search” tab
  6. Search for the “libhooker” package
  7. Tap the “Get” button
  8. Tap on the “Queued” bar at the bottom of your screen
  9. Tap “Confirm”
  10. Reboot your device and re-jailbreak with checkra1n

Continue to Using Sileo

If you’ve used Sileo before, continue to Blocking Jailbreak Detection