The version that was installed before your last update.
A hardware setup used to glitch the console’s Syscon chip into a debug state for firmware writing.
The version currently running on your console. ps4 tool downgrade v100 new
Hardware like the Teensy or TC++ 2.0 is required to dump and patch the console's internal chips. The Downgrade Process (Overview)
Because the PS4 keeps a backup of the previous firmware as a failsafe, tools like can be used to swap these slots, effectively "reverting" the console to its prior state. Key Tools for Downgrading The version that was installed before your last update
Downgrading is a complex task that requires and specialized hardware.
How to Revert the PS4 to a Previous Firmware (Full Tutorial) Hardware like the Teensy or TC++ 2
Unlike a simple factory reset, a firmware downgrade is a hardware-level process. The PS4 motherboard contains two firmware slots:
Newer v100-style toolsets often combine software interfaces with specific hardware programmers. Popular community tools include: