PS3Xploit Official (@PS3Xploit) - Gab Social

PSX-Place

PS3HEN Open Beta Testing [For Advanced Users Only]

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PlayStation 3 (PS3)

How to Jailbreak the PS3 on 4.90 or lower

Where can i check to see if my ps is compatible with the 4.90

PS3 - HFW 4.90.1 (Hybrid Firmware), Page 11

PS3 - HFW 4.90.1 (Hybrid Firmware)

PS3 - Ultimate Toolbox

PS3HEN v3.2.2 (4.90 Support) - Official Release Thread (Homebrew Enabler for the PS3), Page 216