How To] Downgrade Slim PS3 from 4.76 to 3.55 Firmware Using E3 Flasher Tutorial (Part 4 of 4) - YouTube
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PS3 Downgrades
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PS3: Official Rebug 4.78.2-REX/D-REX with COBRA 7.3 released - Hackinformer
Updating Rogero 3.55 to latest CFW? | GBAtemp.net - The Independent Video Game Community
PS3 DOWNGRADE ČIPOVANJE CFW 4.78 - Ostalo - OLX.ba
PS3 CFW 4.78 BY XxZer0ModZxX And Features Out! | PSXHAX - PSXHACKS
Ep.2 - PS3 Jailbreak: How To Update 3.55 OFW/CFW To REBUG 4.78.1 REX - YouTube
PS3] Downgrade to 3.55 and install 4.70.1 Dex Rebug - YouTube