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
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How To - Downgrade The PS3 CFW From 4.82 To 3.55 OFW Step By Step - YouTube
TUTO FR DOWNGRADER SA PS3 DE 4.82 VERS 3.55 - YouTube