How to update playstation 3 system software - YouTube
How to do a system update on ps3 - YouTube
The PS3™ Guides: Updating Your PS3 - YouTube
PS3 Firmware Update 4.87 Is Out, Here Are The Details
PlayStation 3 system software - Wikipedia
If I have a Dex jailbroken PS3 on 4.84, can I still get online even though the latest version is 4. 84? If not, how do I update it without ruining the jailbreak? - Quora
PS3 System 4.30 Update Arriving Tomorrow With Trophies And More