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How to Downgrade Fat PSP 3.80 Without Pandora Battery

Custom firmware is software that runs many different devices, including the Sony Playstation Portable (PSP). The custom firmware allows for many new features to be used, including playing PSP games from the PSP memory stick. The PSP needs to be placed into service mode in order to have custom firmware installed onto it. Other than the Pandora battery, the only other way is to use the Datel service tool. This will allow you to install the new firmware on any PSP, including PSP's running 3.80 Sony firmware.

Things You'll Need

Magic memory stick
Datel service tool

Instructions

- 1
  Turn the PSP off and insert the Magic memory stick into your PSP. Insert the Datel service tool battery into the PSP and the PSP will turn on automatically. The PSP is in service mode.
- 2
  Press the "X" button once to begin the custom firmware installation. If need be, you will be able to cancel the install on the next page that appears. Press the "X" button to verify the installation of the custom firmware.
- 3
  Press the "X" button to shutdown the PSP when the process completes. Remove the Datel service tool and Magic memory stick. Reinsert the normal battery and memory stick into the PSP.
- 4
  Power on the PSP and you will be running custom firmware.

Sony PSP