How to Revert the PS4 to a Previous Firmware (Full Tutorial)
Your console must have a specific "Renaissance" syscon chip (look for "A0" on the chip). how to downgrade ps4 9.60 to 9.00
To revert back to 9.00, you must perform a hardware mod involving: How to Revert the PS4 to a Previous
This process is only possible if your previous firmware version was actually 9.00. How PS4 Downgrading Works how to downgrade ps4 9.60 to 9.00