How to Jailbreak A7 Devices using checkra1n on bootable USB drive

Step 1 You will need:

• USB flash drive (You also can burn a DVD).
• USB 2 lightning cable.
• 64-bit or 32-bit AMD or Intel PC.
• A7 chip up to date device - Link.

Step 2 - Download bootra1n:

• You can seek the latest version here - Link.

Step 3 - Write bootra1n to USB:

• Using Rufus - Link.
• Download Rufus. (I recommend the portable version)
• Press SELECT, open the "bootra1n" ISO file, and press START to flash it to your USB drive.

It will erase your drive!

Step 4 - Reboot and run checkra1n:

• Select the flash drive on boot device options on your PC.
• Choose USB SAFE MODE!
• And it should boot into the login prompt
• Log in as anon, with password voidlinux.
• At the $ prompt, enter- sudo checkra1n.

Step 5 - Jailbreak:

• Plug your device into your PC. Trust your device if necessary.

Remove touch id and passcode before entering the setup.

• The checkra1n app should automatically detect your device and firmware type.
• Click the Start button (using your arrow and enter keys to navigate).
• Checkra1n will want to put your device into Recovery Mode before proceeding. Click the Next button.
• You will now want to follow the on-screen instructions to enter DFU mode.
• After you successfully enter DFU mode, checkra1n will begin exploiting and jailbreaking your device.
• After 2-5 minutes in "this is the real bug setup" you will get the following error message: INFO: task checkra1n:1100 blocked for more than 122 seconeds.
• Disconnect your device till you get this message: DFUSyncUpload FAILED: -1.
• Than reconnect your device. (quickly)
• Now the Operation should continue as normal and youll see booting....
• Your iOS device should now display the checkra1n-themed verbose boot screen.

Do not disconnect it until after the jailbreak completes.

• After the jailbreak finishes, you can click on Done and disconnect your device.

Step 6 - Installing Cydia:

• On your iOS device, you should now see the checkra1n loader app on the Home screen.

It may take up to 5 minutes to appear (If not repeat setup from start).

• Open it, tap on the Cydia app, and Install Cydia.
• The checkra1n loader will then begin downloading the base system and installing Cydia.

It may reboot your device.

• When finished, the app will close and Cydia will appear on your Home screen. Congratulations, jailbreak complete!

Credits

• Bootra1n repository - Link
• Checkra1n - link
• Checkra1n community on reddit - Link
• Rufus - Link
• Void OS - Link

My Reddit post - Link

My YouTube Guide - Link