Downgrading A PS4 TL,DR
- It requires you to have a backup of specific files of your own console, at the version you want to go back to. So, think of it more as a “revert to a previous backup” than an actual downgrade.
— In other words if you want to downgrade your console to e.g. firmware 5.05, you need to have that 5.05 backup ready, from your own console
- It involves good hardware skills: you will need them to do your firmware backup with a development board such as a teensy, and you will need them again to replace your PS4’s SYSCON with a generic one when you want to downgrade.
- Tutorials on this technique still need to show up, so this is for very advanced users for now
http://wololo.net/2020/07/20/wildcard-ps4-downgrade-a-possibility-but/