In almost all cases, if your PS4 is already on a higher firmware like 12.00+, you cannot downgrade it to a lower, jailbreakable version like 9.00.
Older versions that are also jailbreakable but can sometimes suffer from lower stability (higher frequency of "kernel panics"). Non-Jailbreakable Firmwares PS4 Jailbreak firmware
Confirmed as not jailbreakable due to the lack of available kernel or userland exploits. Critical Considerations In almost all cases, if your PS4 is
All PS4 models—Original (Fat), Slim, and Pro—are compatible with jailbreaks as long as they are on the correct firmware. In almost all cases
Sony frequently releases updates to patch security vulnerabilities. Currently, the following versions be jailbroken: