checkm8 a5

• The main recommendation for A5(X) devices is to just use kDFU mode as much as possible. For the procedures that need pwned DFU mode (like tethered downgrade/boot), continue reading this section.
• For A5(X) devices, "pwnDFU mode (A5)" option can be used, BUT ONLY IF the device is put in pwnDFU mode beforehand, with my fork of checkm8-a5 using an Arduino and USB Host Shield.
• checkm8-a5 for the Pi Pico is also an option: https://www.reddit.com/r/LegacyJailbreak/comments/1djuprf/working_checkm8a5_on_the_raspberry_pi_pico/
• Proceed here for a video tutorial on how to install and use checkm8-a5 Arduino: https://www.youtube.com/watch?v=efAxIXieCLM
  • Stop the video tutorial around 7:12 since the steps beyond this part are no longer necessary.
• Here is also a tutorial from ios.cfw.guide: https://ios.cfw.guide/using-checkm8-a5
• If entering pwnDFU mode and/or sending pwned iBSS failed, the downgrade/restore will not work, and you need to force restart to try again.
• Also make sure that you have not sent a pwned iBSS yet.