PS3 Update to System Software 4.89: Here's a Full Guide for You
PS3 4.81 System Software Update PS Vita 3.63 Update DETAILS - YouTube
PS3 Custom Firmwares (CFWs) : Free Download, Borrow, and Streaming : Internet Archive
My brother dropped off our old PS3 collection (left). On the right is my collection since this year. It's a slim model on os version 4.81. Do you think it's worth it
PS3 - 4.81 (OFW) Firmware Update Now Live !!! | PSX-Place