Downgrade from 9.03 to 9.0 or some other version : r/PS4Hacks2
PS4 Firmware Downgrade :... - Malaysia PS4 Jailbreakers | Facebook
How to Downgrade PS4 from 10.50 to 9.00 Tutorial + Download - YouTube
Wololo on Twitter: "PS4 Syscon keys allegedly disclosed, could ultimately mean PS4 downgrade is possible https://t.co/beD9Qvy5eT https://t.co/XIsZeeI1pP" / Twitter