Once in DFU, the tool will automatically apply the exploit and reboot your device. Finalize on Device Unlock your phone and look for the Checkra1n loader Open it and tap to install the package manager. Important Post-Jailbreak Notes Semi-Tethered Status
Wait for the "All Done" message and for your device to reboot.
: Users typically use the Rufus tool to flash the ISO onto a USB drive.