If you are on firmware (e.g., 10.01, 11.00), you cannot downgrade to 9.00 to hack the console. You must wait for a new exploit to be released for the higher firmware.
You must be proficient in soldering fine wires to very small points on the PS4 motherboard.
Firmware 13.02 is fully patched against known user-land exploits. There is no public browser or kernel exploit available for this version that allows for a "soft" (software-only) downgrade.
Here is a detailed breakdown of the situation, the methods that do exist, and the reality of the 9.00 exploit. ps4 downgrade 1302 to 900
Improper flashing of the Syscon or NOR will cause a brick, making the PS4 unbootable.
Connect the NOR flasher and take at least two identical dumps (using NORValidator to ensure they are clean).
PlayStation 4 console modding relies heavily on low-level system exploits. The most popular and stable exploit is pOOBs4, which requires firmware version 9.00. If your console updated to firmware 13.02, running homebrew or backups directly from the user interface is blocked. If you are on firmware (e
To downgrade a PS4 from 13.02 to 9.00, you must meet strict hardware prerequisites. It requires advanced soldering skills, specialized hardware flashing tools, and critically, a backup of your own console's unique data from when it was previously on an eligible lower firmware. The Core Concept: How PS4 Firmware Reversals Work
The short answer is: Here is the reality of the situation and what your options actually are. Why Downgrading is So Difficult
. The PS4 hardware only allows you to "revert" to the firmware version that was installed immediately before your current one. The Revert Limitation Firmware 13
: You can check your console's error history logs to see a record of which firmware versions were previously active on your device.
As of right now,