Custom Firmware 5.00 M33-3


The Installation requires a PSP with 3.52 M33-3 or higher [fat PSP], or
3.60 m33 or higher [Slim PSP]. If your PSP  is the Offical Sony Firmwares
or lower version of M33 you shouldn't try it or you will end up with a brick PSP.
You will need a USB cable and ensure the Battery is 78% loaded, Follow the steps below:

1. Extract the file you have downloaded anywhere on your computer.
2. Connect your PSP to your computer using the USB cable.
3. Copy the "UPDATE" folder into /PSP/GAME
4. Exit USB Mode and go to your XMB(Game > Memory Stick)
5. Run the "PSP Update version 5.00"

The screen turns black. Follow the on screen instructions, these
instructions will take you to the Official Sony Update screen. Press X
for start, and follow the on screen instructions. It will start the update once you agree to the agreement and a download bar will appear. Wait for it to be completed(100%)and  press the "X" button to restart automatically.
Then you can erase "UPDATE" folder, they won’t be any longer necessary.

Download the Firmware>>>

2 thoughts on “Custom Firmware 5.00 M33-3”

  1. hi my psp has 3.90 m33-3 custom firmware on it and when i finished updating it on my psp
    it worked but the cxmb prx plugin thing was i went 2 recovery menu and re-enabled it. when i pressed the exit thing my psp just went blak. so i took of the battery and put it bak on again and when i turned it on it was black 4 like 3 mins or sumting and it turned off automaticly.
    can u pls help me?!!!!!!!!!!

  2. Let’s first go to the recovery mode and disable the cxmb plugin temporary and check whether the PSP will black out or not. I am not using the plugin currently. I check for you when I am back this weekend as on holidays now.

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