PS3 - Chapter I - PS3 Downgrade General Information | PSX-Place
PS3 - Chapter I - PS3 Downgrade General Information | PSX-Place
Downgradable PS3 Models & Base Firmware with MinVerChk | PSXHAX - PSXHACKS
Tutorial - [TUT] How To Downgrade w/e3 flasher to any CFW | Se7enSins Gaming Community
PS3 - Chapter I - PS3 Downgrade General Information | PSX-Place
JOGi MODS :: PS3 Downgrade Service - Back To 3.55 OFW
Downgrading slim to 3.55 | PSX-Place
PS3] Downgrade to 3.55 and install 4.78.1 Dex Rebug - YouTube
[How To] Downgrade Fat PS3 From 4.66 to 3.55 Firmware Using E3 Flasher Tutorial (Part 3 of 3) - YouTube
How To Downgrade a PS3 Any CFW To 3.55 - Voice Tutorial with downloads [HD] - YouTube
I purchased a PS3 backward compatible from ebay for a good price and I'm impressed how clean it is. However... It's still on firmware 2.50. Should I update the firmware? : r/PS3
Sony PlayStation 3 Fat: Downgrade to Firmware 3.55 - YouTube