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I have psp firmware version 3.75. can i downgrade it without pandora’s battery or exploit?

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I have a psp with the firmware version 3.73 and i want to downgrade it so that i can use custom firmware. I was wondering if there is a way to do it without useing a lumines/GTA exploit, someone elses custom psp, or the pandora’s battery. Is it possible to do this? For any question message me.

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2 COMMENTS

  1. yes its possible.

    you can buy a mod chip and install it

    or you can buy a new motherboard with custom firmware

    other then that, no.

    the lumines downgrader is only for 3.50 and below

    the gta downgrader is only for 2.81 and below

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