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downgrade offical firmware

Discussion in 'Sony PSP - Mod and firmware discussion' started by pi2pi, Sep 19, 2007.

  1. pi2pi

    pi2pi Member

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    Hi all, a simply question. I intend to buy a PSP and crack the firmware myself.

    Question can I:
    1. buy a psp with offical firmware of any version.
    2. Downgrade tht firmware with "lumines" UMD to ver 1.50
    3. upgrade it to homebrew custom firmware 3.52-mm33.4

    Please advice. Thank You.
     
  2. larrylje

    larrylje Active member

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    If the firmware is 3.50 or below you can downgrade it with the Lumines downgrader.

    Firmware between 2.81 - 3.03 can be downgraded via GTA Liberty City Stories.

    Firmware 2.80 or lower can be downgraded with a downgrader that doesn't require a game exploit.

    3.51 to 3.71 will require a Pandora battery unbricker/downgrader. This method will require you to have a PSP with 1.50 or custom firmware installed to create the Pandora Battery.
     
    Last edited: Sep 19, 2007
  3. pi2pi

    pi2pi Member

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    thanks for the reply.

    So can i double confirm.

    - PSP official firmware ver3.5 and below can downgrade with Lumines UMD.
    - PSP official firmware 2.8 requires only a software and NO umd to downgrade.

    ^_^" .... also, does all custom firmware require a phsycial UMD to be inside the psp to play iso/cso games?
     
  4. larrylje

    larrylje Active member

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    Thats correct.

    Both OE and M33 CFW have NO UMD options. 3.52 M33-4 Sony NP9660 NO UMD is the most compatible driver for NO UMD loading for ISO/CSO files.
     

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