Custom Firmware 3.90 M33


3.90 M33

Dark_AleX has released PSP Custom Firmware 3.90 M33 to the world. This new firmware bring a major feature on board, Skype for the PSP. Finally its here. (Confirmed this works well, Skype calls sound just as good as on the PC)


– Copy the UPDATE folder into /PSP/GAME/
– Get the 3.90 sony update from somewhere, and put it in same folder, with name “390.PBP”.
Alternatively, you can let the installer to download for you via wifi.
– Run it, the update will be done by Sony updater. At the end when you are asked to reboot the
PSP pressing X or O, do it.


– 3.80 -> 3.90
– March33 NO UMD: fixed (yet another) bug related with exiting with home. (infinite semaphore wait)

Changes in updater:

– The degeneration check and correction of IDS keys happens too in 3.71 now.
– Added code to download 3.90 PBP from net via wifi.
Note that his code is not yet 100% stable, it may crash when selecting AP. In that case,
reinit the installer.
– L+triangle has been restored as method to bypass battery.
If you already have 390.PBP keep those buttons pressed until you see “Veryfing 390.PBP”.
If the 390.PBP is being downloaded bia wifi, press those buttons at the end of download until
you see the previous sentence.

Download: Custom Firmware 3.90 M33
(Custom Firmware 3.90 M33 - 211.8 KiB - 88,871 Hits)

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  1. PSP fanboy says:


  2. PSP fanboy says:


  3. PSP fanboy says:

    everyone get psp firmware 5.00.It will make your psp 2000 like a psp 3000.

  4. younes says:

    good work for this firm

  5. Baz says:

    Buy a pandora battery and magic memory stick form

  6. Roxas says:

    Firmware 5.00m33 is out everyone! It’s on DarkAlex’s site. I’m getting ready to put it on mine, so I can now play FF7! Yay! Hopefully, it will still work with FF9. There’s no reason it shouldn’t, but you never know.

  7. dude says:

    i’ve been trying to upgrade my phat 3.52 m33-4 to 3.90 m33 with no luck, error 000060 id degenaration blabla.. and it reset it self.
    anyone know how to fic this?

  8. Jason1980 says:

    Is this custom firmware for PSP3000?

  9. david says:

    i have 3.72 and i want 3.90m33, what can i do? help me

  10. Omega says:

    I have a 3.90 M33 system software for my slim psp. I downloaded some games but when i try to play them there not there. I put them in the ISO folder and i dont know what im doing wrong. help me

  11. hgonzalez06 says:

    yo i am really new at this, im trying to updaye my psp slim to 3.90M33 but its not allowing me cus i have 5.50 and that i do not need an update. what can i do? i bet it something simple too.