If your phone dies or restarts, you must plug it back into the USB drive and run the process again to reactivate the jailbreak.

Flash the ISO to a USB drive and boot your PC from it.

For iPhone 8, 8 Plus, and X on iOS 14, you must disable the passcode and "Skip A11 BPR check" in options for the jailbreak to work.

Click and choose the downloaded Justatech_Checkra1n_0.4.iso . Keep the partition scheme as MBR for maximum compatibility. Click Start to flash the image. 2. Boot into Checkra1n Restart your computer.

The Justatech interface will load, showing the Checkra1n menu. 3. Running the Jailbreak Connect your iPhone/iPad to the PC.

Checkra1n is a semi-tethered jailbreak based on the "checkm8" bootrom exploit. Because the exploit requires specific USB controller access, it traditionally only runs on macOS or Linux. "Justatech Checkra1n 0.4 Windows" (often provided as an ISO) is a community-modified version designed to bypass this limitation by booting a lightweight Linux environment on your PC.

Always create an iCloud or iTunes backup before attempting a jailbreak.