Be extremely wary of anyone offering a "simple software solution" for downgrading. The PS4's security architecture is robust, and if a software-based downgrade becomes possible, it will be widely discussed and vetted by the legitimate homebrew community—not hidden behind paywalls or private Discord servers.
The obsession with firmware 9.00 comes down to the homebrew community. Version 9.00 is widely regarded as one of the most stable, fully exploited firmware versions in PS4 history (via the pOOBs4 exploit). A PS4 on 9.00 allows users to: Run homebrew applications and custom dashboards. Install backup copies of games they own. Emulate retro consoles. Apply community graphic patches and mods to retail games. Your Best Alternatives If You Are on 13.02
Sony designed the PlayStation 4 security architecture to prevent users from installing older software versions. They achieve this through several built-in mechanisms:
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. ps4 downgrade 13.02 to 9.00
The PS4 motherboard features a dedicated chip called the Syscon (System Control). The Syscon acts as the security gatekeeper for the console's firmware. Every time you update your PS4, the Syscon writes the new firmware version number to its internal, non-volatile memory. The Check Mechanism
You use a computer to read and extract the raw binary data (the "dump") from both chips.
If you are on 13.02, your most realistic paths are: Be extremely wary of anyone offering a "simple
Firmware 13.02 was released by Sony as a minor security patch. According to the official patch notes, version 13.02 primarily contains security fixes to the system software. It also introduced the ability to sign into your PS4 without a password using the PS App by scanning a QR code, similar to the PS5 login process.
The PlayStation 4 modding community heavily revolves around firmware version 9.00. This specific version allows for a stable, webkit-based exploit (p00bs4) that grants users full homebrew access, custom themes, and backups. However, if your console has been updated to the latest 13.02 firmware, you might feel locked out of these features.
: The PS4 stores firmware in two slots on its motherboard—an active slot (Slot A) and a backup slot (Slot B). You can only revert to the firmware stored in the backup slot. Version 9
Suddenly, the console he had bought off the shelf was his again. He could back up his discs to the internal SSD. He could overclock the fan speeds. He could run emulators for retro games that Sony would never allow on the store. He wasn't playing by Sony's rules anymore; he was playing by his own.
Downgrading a PlayStation 4 from a high firmware version like
The PS4 motherboard contains two "slots" for system software: an active slot inactive slot
This is not a traditional software downgrade. Instead, it restores a backup of your console's own previous firmware state. How the Revert Method Works