A revert is not always possible. According to the community-maintained ConsoleMods Wiki, you if:
The Ultimate PS4 Downgrade Guide: Can You Go From Firmware 13.02 to 9.00?
This process erases all data on the hard drive. Warranty: Opening the console voids any remaining warranty. Alternatives to Hardware Downgrade
The only known method to return to a lower firmware is by performing a "firmware revert." This is not a downgrade in the sense of installing an older update file. Instead, it is a process that exploits the PS4's own fail-safe system. The console saves the data of the on the motherboard—referred to as Slot A (active) and Slot B (backup). The revert process involves corrupting the active slot (Slot A), which forces the system to boot from the backup slot (Slot B), effectively "reverting" to the previous firmware.
Section B — Short Answer (30 marks) Answer concisely. Each question worth indicated marks. ps4 downgrade 1302 to 900
Improper flashing of the Syscon or NOR will cause a brick, making the PS4 unbootable.
Downgrading a console's firmware, however, is a complex process that poses significant technical challenges. It requires a deep understanding of the console's architecture, firmware design, and the specific vulnerabilities that can be exploited to achieve this goal.
If you are considering this, ensure you study the ConsoleMods Wiki for PS4 Firmware Reversion for the most current information.
Section C — Practical/Applied (40 marks) Provide clear, technical answers. Show steps and reasoning. A revert is not always possible
Your console must have been updated directly from 9.00 to 13.02 without any intermediate updates (like 10.x, 11.x, or 12.x). Hardware Revert Guide (Expert Only)
Solder wires from your Raspberry Pi Pico or Teensy directly to the communication points of the Syscon chip on the PS4 motherboard.
This does not require a jailbreak but is only for game data, not the system OS. 3. Safety Warnings
firmware in two separate slots on the Syscon chip. A "revert" swaps these slots. : You can only go back to the version you were on directly before updating to 13.02. Warranty: Opening the console voids any remaining warranty
: Because the hardware mod is complex and risky, many in the community recommend simply buying a second-hand PS4 already running 9.00 or lower if your goal is jailbreaking.
: The Firmware Revert page on ConsoleMods Wiki covers the technical requirements, chip compatibility, and risks.
Yes, but it is not a simple software exploit. You cannot download a 9.00 update file onto a USB flash drive, plug it into a 13.02 console, and trigger a downgrade through the system menu. Sony explicitly blocks rolling back firmware via standard software methods to prevent security exploits.
You need to access the (located near the southbridge) or the BD controller on the motherboard.
There is often confusion regarding PS4 firmware version numbers. The number typically refers to a specific, very early factory firmware version (DevKit/Prototype range) or is a confusion with error codes/Update files. However, most users asking for a downgrade to 9.00 are currently on a much higher firmware, such as 10.00 or 10.01 , which is likely where the confusion lies.