downgrade/ upgrade Psp for Iso\’s?
My Psp was version 3.80 M33 custom firmware, but my little cousin brought his naruto game which included an upgrade to official firmware 5.55. Now none of my Iso’s in my memory card works. I tried rehacking it with my pandora battery to 3.80 but it didn’t work. What is the latest custom firmware and how to upgrade/downgrade my psp to that firmware so i can play my iso’s again?
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