While you do not have a full jailbreak, developers have successfully adapted the exploit chain for userland code execution up to version 13.02. While this does not let you play backup game packages or load GoldHEN, it does allow for extremely basic modifications, basic web-browsing tweaks, and file-system viewing.
No, you a PS4 from 13.02 to 9.00 using a USB drive or a simple recovery menu trick.
What was the your PS4 had right before updating to 13.02? ps4 downgrade 1302 to 900 top
The only known method to reverse your PS4's firmware to a previous version is a complex hardware-based procedure often called a "Firmware Revert." This is not a "downgrade" in the traditional sense, as it doesn't allow you to jump to any arbitrary version. Instead, it swaps your current firmware with the previous one.
You reassemble the console, power it on, and check if the system software has successfully "reverted" to the older version. While you do not have a full jailbreak,
: The PPPwn exploit revolutionized the scene by opening up jailbreaks up to firmware 11.00. Researchers continuously test the primary vulnerabilities used in PPPwn to see if elements can be adapted for higher firmwares like 13.02.
Advanced modders de-solder the Syscon chip from the motherboard, read its raw memory using a $50 Raspberry Pi Pico, manually edit the "minimum version" flag (changing it from 0x0C – 12.00 – back to 0x09 – 9.00), and then re-solder the chip. It’s brain surgery on a silicon patient. What was the your PS4 had right before updating to 13
“Cannot start the PS4. Connect the DualShock 4 via USB cable, then press the PS button.” (Error SU-41350-3)
However, if your console is on a newer firmware (such as 10.01 or higher), downgrading is a complex barrier to entry.