It is apparently possible to revert your PS4 to its previous firmware version, without any backup - Wololo.net
SonysNightmare 🏴☠️ on Twitter: "🔥 FINALLY AFTER HOURS AND HOURS OF WORKING AND TESTING FINALLY THE MOMENT HAS COME A DOWNGRADE TOOL FOR PS4 ✅️ LOAD PS4 DEBUG PAYLOAD FROM ANY HOST
Downgrading Firmware - PS3 Developer wiki
Installing PS4 7.50 & Downgrading To 7.02 | Playstation 4 7.50 - YouTube
How to: Downgrade digital PS4 games to version 1.0 *updated* - GamePitt -
Wololo on Twitter: "PS4 Syscon keys allegedly disclosed, could ultimately mean PS4 downgrade is possible https://t.co/beD9Qvy5eT https://t.co/XIsZeeI1pP" / Twitter
PKGDT: PS4 PKG Downgrade Tools GUI for Backporting Games by Gerfra | PSXHAX - PSXHACKS
It is apparently possible to revert your PS4 to its previous firmware version, without any backup - Wololo.net
Patching the PS4 Syscon For firmware revert and repair: Guide by BwE + upcoming syscon flasher - Wololo.net
PlayStation 4 Glitch Pinout, PS4 Slim / Pro Downgrading Update | Page 3 | PSXHAX - PSXHACKS
PS4 News - UPDATE on Downgrading systems, someone has successfully done it - YouTube
Scena PS4] Un nuovo video tutorial spiega come eseguire il ripristino della console PlayStation 4 ad un precedente stato di jailbreak – BiteYourConsole