Downgrade From 4.75 To 3.55 REBUG Using Rogero Downgrader
1) Update To 4.70 Rebug
2) Install Rebug ToolBox (Latest Version)
3) Put Your USB inside the Right Port Of Your PS3
4) Open Rebug ToolBox And Go To Utility Section
5) Click 'Export Flash To File' And Wait Until It Finished
6) After That Click Dump EID Root Key Your PS3 Will Beep 3 Times
7) Go To DEX/CEX Section 'Click Rewrite Target ID in Flash' After Thats Done It May Reboot
8) Go To The Same Section DEX/CEX And Click LV2 Kernal It Will Reboot And Your on DEX.
9) Not Done Yet Open Rebug ToolBox And Go On Selector Section And Go On System Mode Change It To REBUG and XMB Operation Mode To Debug And Debug Menu Type To DEX.
Your Now On Officially On DEX !
4.70 REBUG
MD5 - cf8c1319e33aa3d8232b8ce6dd47f459