A quick search for “PS4 downgrade 13.02 to 9.00” yields many fraudulent results:
Do not pay for downgrade services. Anyone claiming to downgrade 13.02 via software is lying. ps4 downgrade 13.02 to 9.00
From the PS4’s inception, Sony implemented a hardware-based fuse or anti-rollback system. Inside the console’s Southbridge chip and the main system-on-a-chip (SoC), there exists a set of one-time programmable fuses. Each official firmware update updates certain keys and increments an internal fuse counter. When the system boots, it compares the currently installed firmware’s version number against the fuse count. If the firmware version is lower than what the fuses indicate, the console refuses to boot, effectively bricking itself. A quick search for “PS4 downgrade 13
Firmware 13.02 burns a specific set of fuses that are not present or are less advanced in version 9.00. Downgrading would require resetting these fuses, which is physically impossible without specialized equipment and direct hardware modification (e.g., replacing the Southbridge chip entirely). For the average user, there is no software method to circumvent this. Thus, any claim of a “downgrade” from 13.02 to 9.00 via a simple USB drive or software tool is fraudulent. Do not pay for downgrade services
While the main CPU (APU) enforces the rule, the Syscon chip (a smaller microcontroller) holds the truth about your firmware version. Advanced modders have learned to: