The internet is flooded with websites and video titles claiming they can downgrade a PS4 from 13.02 to 9.00 top using a "special .PUP update file" or custom custom firmware (CFW) installer.
: Not all PS4 models can be downgraded in the same way, and some might require additional steps or tools. Identify your PS4 model to ensure you're following the correct guide. ps4 downgrade 1302 to 900 top
. The PlayStation 4 architecture uses dedicated hardware tokens and an anti-downgrade mechanism tied to the console's SYSCON and NOR flash memory chips to prevent users from installing older, vulnerable software versions. However, seasoned hardware modders can leverage a deeply technical process called Firmware Reversion , which allows a console to swap back to its immediately preceding firmware version under strict hardware conditions. The internet is flooded with websites and video
: If you backed up your save data, you can now restore it. : If you backed up your save data, you can now restore it
To execute a legitimate firmware rollback to the console's previous slot, a developer or hobbyist cannot rely on the console's user interface. Instead, they must perform a physical hardware modification termed .