Completely Restoring PS3 to factory (Removing Rebug 4.81.2) : r/ps3homebrew
Factory Service Mode - PS3 Developer wiki
How to Jailbreak a PS3? PS3 Jailbreak 4.88 – Super PSX
يقظة ثابت تصفيق ps3 update 4.83 download - ofogh-energy.com
Jailbreak Your PS3 4.82 Version And install CFW 4.83 PS3Xploit V2.0 by NaBiL Moumen
Got all this for 90CAD. It's on version 4.81. My FAT PS3 is on 4.84 REBUG. FAT PS3 won't let me sign into PSN until I update...does another CFW exist or should
PS3 Downgrade Jailbreak 4.81 To 3.55 With Password No Survey