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PS3 Firmware 4.89 and Vita Firmware Update 3.74 Downgrades Online Functionality
PS3 System Software Update 4.87 Now Available For Download - PlayStation Universe
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Jailbreak PS3 Firmware 3.55 With PSN Support Released By Geohot, Download Now!! [Guide]
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PS3 Custom Firmwares (CFWs) : Free Download, Borrow, and Streaming : Internet Archive
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