For most users, the safest, cheapest, and least stressful option is to buy a used PS4. Look for consoles advertised as "unpatched," "low firmware," or specifically running firmware 9.00 or lower. Many sellers on secondary markets list the firmware version in the description. 3. Keep the Console Offline
Within the PS4's flash memory (NOR/NAND), cryptographic keys change with major firmware updates. The console will refuse to boot if the software version does not match or exceed the hardware-enforced rollback flag. The Hardware Exception: The Revert Method
Sony patched these specific kernel vulnerabilities in version 9.03 and all subsequent versions, up to the current 13.02 release. The Core Technical Barrier ps4 downgrade 13.02 to 9.00
On the subject of jailbreak methods, tools like the and Raspberry Pi Zero have become popular for automating the process on 9.00 by emulating the USB drive required for the exploit.
Technically yes, but impractical for most users. For most users, the safest, cheapest, and least
If your system qualifies for a reversion, completing the process demands advanced micro-soldering skills, specialised extraction software, and external hardware interfaces.
The only way to downgrade a PS4 is through a "Firmware Revert," a hardware-based modification that works by manipulating these chips directly. The Hardware Exception: The Revert Method Sony patched
You use a computer to read and extract the raw binary data (the "dump") from both chips.
You must have an official, valid backup of the NOR flash from when your PS4 was on version 9.00 or lower.