Okay so I'm having trouble. My brother downloaded an update that my custom firmware doesnt support (4.86) and I need to downgrade to (4.85) or at least make my ps3 workable again.
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Downgradable PS3 Models & Base Firmware with MinVerChk | PSXHAX - PSXHACKS
PS3 SLIM CECH-2504B K8P2716UZC BIN MX25L1635D BIN Download – RepairAllTV
Phones & Gadgets - PS3 SLIM CECH 2504B 4.80 OFW Downgrade + Jailbreak in Process | Facebook
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Is this jailbreakable? m inVerChk CECH 2504B 1A : r/ps3hacks