It has been released last October 17 but I waited for a while for CFW 5.00 M33 to stabilize. After the initial release, several bugs came out and I wanted it to be fixed first.

CFW 5.00 M33-3 was released last October 23. So far M33-3 is a bit stable. A major bug has been fixed since M33-2.

CFW 5.00 M33 Improvements:

• Sleep Timer – You can now set a timer when playing music.
• USB Auto-Connect – The system automatically changes to USB mode when a USB cable is connected.
• New XMB wave
• Full-Screen keyboard – QWERTY keyboard has been added.
• PlayStation Network
• PlayStation Store
• Several Bug Fixes

I just finished upgrading to CFW 5.00 M33-3 and so far all of my games are working well. No problems whatsoever. My PSP is a Slim Sony PSP ver. 4.01 M33-2. Take note that the instructions are different for the Fat Sony PSP.

This is a step-by-step guide to upgrading your PSP Custom Firmware. I hope this tutorial will help you safely upgrade your PSP to the latest CFW. However, remember that there is a risk involved that you might brick your PSP and render it useless. Just make sure you fulfill all the requirements.

*Warning: Please follow the instructions properly. Do these at your own risk.

Requirements:

1. Sony PSP Slim
2. Custom Firmware (CFW) 4.01 M33-x. (Please do not attempt this on official Sony firmwares. Older CFWs will also not work.) You need at least CFW 4.01 M33-x by Dark-Alex.
3. Wireless network (Wifi). Make sure your PSP Wifi connection is setup properly. You need to connect to the internet to retrieve the latest update files.
4. More than 80% battery
5. At least 30MB memory stick space. The update already takes up 26MB space.
6. You also have to enable the network update of the M33 Custom firmware or you will end up updating to the official Sony firmware.

To check if CFW M33 Network Update is enabled, go to recovery mode:

1. Shutdown your PSP. Make sure it is not in sleep mode.
2. Turn on your PSP while holding the R button.
3. When recovery mode appears, go to Configuration
4. Make sure this is what appears, Use M33 Network Update (Currently Enabled)

Let’s proceed:

1. Go to Settings
2. Select Network Update
3. Select your Wifi connection. You will see the following:
   

   Connecting to the access point.
   Please wait…
   Connection Name
   SSID
   Exchanging Key Information (This might appear depending on your Wifi network setup)
   Obtaining IP Address

4. It will check if there is a firmware update available. If there is, you will see:
   

   Network Update has found a later
   version.
   To download, insert a Memory Stick
   with at least 1 MB free space and press
   the X button.

5. Press the X button to download.
6. It will download the initial update. After that, you will see:
   

   Download completed.
   The update is now available in your
   Memory Stick.
   To install now, press the X button
   To install later, go to [Game]

7. Press the X button to install.
8. This will appear next:
   

   Unpacking… done
   500.PBP doesn’t exist.
   Do you want to download it from the internet? (x=yes, R=no)

9. Press the X button to download.
10. It will again show you the network connection screen, choose your Wifi connection.
11. You will see the following:
    

    Connecting to the access point.
    Please wait…
    Connection Name
    SSID
    Exchanging Key Information (This might appear depending on your Wifi network setup)
    Obtaining IP Address

12. Next you will see:
    

    File Size: 27106965 bytes (26 MB)
    Downloading… 0%

13. After reaching 100%, you will see:
    

    File Size: 27106965 bytes (26 MB)
    Downloading… 100%
    File Saved (size = 27106965 bytes).
    Returning to M33 updater…

14. Then you will see:
    

    Unpacking… done.
    Please wait…

15. Next you will see:
    

    Verifying 500.PBP… ok
    Verifying u235.prx… ok
    Press X to start the update, R to exit

16. Press the X button to continue the update
17. You will then see:
    

    Verifying 500.PBP… ok
    Verifying u235.prx… ok
    Press X to start the update, R to exit
    Starting sce updater. Wait…

18. The PSP Update ver 5.00 screen will appear next, press X to continue.
19. Follow the onsreen prompts, select Accept and keep on pressing the Right Button of the D-Pad until you see the option to press the X button
20. Press the X button to continue the upgrade
21. Next you will see:
    

    Installing…
    Do not turn off the power, disconnect
    the AC adaptor or remove the
    Memory Stick
    0%

22. Once it reaches 100%, you will see this:
    

    Update completed
    Press the X button to restart.
    You can now delete the update data
    from your Memory Stick.

23. Press the X button. You MUST do this, otherwise you’ll end up with a brick.
24. After your PSP restarts, go to Settings
25. Select System Settings
26. Select System Information
27. You should see something like this:
    

    System Software 5.00 M33-3
    Nickname
    MAC Address

There you have it… you have updated your PSP online!

I just finished upgrading my PSP to ver 4.01 M33-2. I have also updated my tutorial in upgrading via Network Upgrade.

*Warning: Please follow the instructions properly. Do these at your own risk.

This is a step-by-step guide to upgrading your PSP Custom Firmware. I hope this tutorial will help you safely upgrade your PSP to the latest CFW.

However, remember that there is a risk involved that you might brick your PSP and render it useless. Just make sure you fulfill all the requirements.

I was using a Slim Sony PSP ver 3.90 M33-3 to upgrade to 4.01 M33-2. I used to have a ver 3.80 M33-5 custom firmware and I upgraded it via network upgrade (Check previous post). I think the instructions are different for the Fat Sony PSP.

Requirements:

1. Sony PSP Slim
2. Custom Firmware (CFW) 3.80 M33-x. (Please do not attempt this on official Sony firmwares. Older CFWs will also not work) You need at least CFW 3.80 M33-x by Dark-Alex.
3. Wireless network (Wifi). Make sure your PSP Wifi connection is setup properly. You need to connect to the internet to retrieve the latest update files.
4. More than 80% battery
5. At least 30MB memory stick space. The update already takes up 25MB space.
6. You also have to enable the network update of the M33 Custom firmware or you will end up updating to the official Sony firmware.

To check if CFW M33 Network Update is enabled, go to recovery mode:

1. Shutdown your PSP. Make sure it is not in sleep mode.
2. Turn on your PSP while holding the R button.
3. When recovery mode appears, go to Configuration
4. Make sure this is what appears, Use M33 Network Update (Currently Enabled)

Let’s proceed:

1. Go to Settings
2. Select Network Update
3. Select your Wifi connection. You will see the following:
   

   Connecting to the access point.
   Please wait…
   Connection Name
   SSID
   Exchanging Key Information (This might appear depending on your Wifi network setup)
   Obtaining IP Address

4. It will check if there is a firmware update available. If there is, you will see:
   

   Network Update has found a later
   version.
   To download, insert a Memory Stick
   with at least 1 MB free space and press
   the X button.

5. Press the X button to download.
6. It will download the initial update. After that, you will see:
   

   Download completed.
   The update is now available in your
   Memory Stick.
   To install now, press the X button
   To install later, go to [Game]

7. Press the X button to install.
8. This will appear next:
   

   Unpacking… done
   401.PBP doesn’t exist.
   Do you want to download it from the internet? (x=yes, R=no)

9. Press the X button to download.
10. It will again show you the network connection screen, choose your Wifi connection.
11. You will see the following:
    

    Connecting to the access point.
    Please wait…
    Connection Name
    SSID
    Exchanging Key Information (This might appear depending on your Wifi network setup)
    Obtaining IP Address

12. Next you will see:
    

    File Size: 25643269 bytes (24 MB)
    Downloading… 0%

13. After reaching 100%, you will see:
    

    File Size: 25643269 bytes (24 MB)
    Downloading… 100%
    File Saved (size = 25643269 bytes).
    Returning to M33 updater…

14. Then you will see:
    

    Unpacking… done.
    Please wait…

15. Next you will see:
    

    Verifying 401.PBP… ok
    Verifying u235.prx… ok
    Press X to start the update, R to exit

16. Press the X button to continue the update
17. You will then see:
    

    Verifying 401.PBP… ok
    Verifying u235.prx… ok
    Press X to start the update, R to exit
    Starting sce updater. Wait…

18. The PSP Update ver 4.01 screen will appear next, press X to continue.
19. Follow the onsreen prompts, select Accept and keep on pressing the Right Button of the D-Pad until you see the option to press the X button
20. Press the X button to continue the upgrade
21. Next you will see:
    

    Installing…
    Do not turn off the power, disconnect
    the AC adaptor or remove the
    Memory Stick
    0%

22. Once it reaches 100%, you will see this:
    

    Update completed
    Press the X button to restart.
    You can now delete the update data
    from your Memory Stick.

23. Press the X button. You MUST do this, otherwise you’ll end up with a brick.
24. After your PSP restarts, go to Settings
25. Select System Settings
26. Select System Information
27. You should see something like this:
    

    System Software 4.01 M33-2
    Nickname
    MAC Address

Congratulations! You have updated your PSP online!

This is a step-by-step guide to upgrading your PSP Custom Firmware. I hope this tutorial will help you safely upgrade your PSP to the latest CFW.

However, remember that there is a risk involved that you might brick your PSP and render it useless. Just make sure you fulfill all the requirements.

I was using a Slim Sony PSP ver 3.80 M33-5. I’m not sure if the instructions are the same for the Fat Sony PSP.

Requirements:

1. Custom Firmware (CFW) 3.80 M33-x. (Please do not attempt this on official Sony firmwares. Older CFWs will also not work) You need at least CFW 3.80M33-x by Dark-Alex.
2. Wireless network (Wifi). Make sure your PSP Wifi connection is setup properly. You need to connect to the internet to retrieve the latest update files.
3. More than 80% battery
4. At least 30MB memory stick space. The update already takes up 25MB space.
5. You also have to enable the network update of the M33 Custom firmware or you will end up updating to the official Sony firmware.

To check if CFW M33 Network Update is enabled, go to recovery mode:

1. Shutdown your PSP. Make sure it is not in sleep mode.
2. Turn on your PSP while holding the R button.
3. When recovery mode appears, go to Configuration
4. Make sure this is what appears, Use M33 Network Update (Currently Enabled)

Let’s proceed:

1. Go to Settings
2. Select Network Update
3. Select your Wifi connection. You will see the following:
   

   Connecting to the access point
   Exchanging Key Information (This might appear depending on your Wifi network setup)
   Obtaining IP Address

4. It will check if there is a firmware update available. If there is, you will see:
   

   Network Update has found a later
   version.
   To download, insert a Memory Stick
   with at least 1 MB free space and press
   the X button.

5. Press the X button to download.
6. It will download the initial update. After that, you will see:
   

   Download completed.
   The update is now available in your
   Memory Stick.
   To install now, press the X button
   To install later, go to [Game]

7. Press the X button to install.
8. This will appear next:
   

   Unpacking… done
   390.PBP doesn’t exist.
   Do you want to download it from the internet? (x=yes, R=no)

9. Press the X button to download.
10. It will again show you the network connection screen, choose your Wifi connection.
11. You will see the following:
    

    Connecting to the access point
    Exchanging Key Information (This might appear depending on your Wifi network setup)
    Obtaining IP Address

12. Next you will see:
    

    File Size: 25654469 bytes (24 MB)
    Downloading… 0%

13. After reaching 100%, you will see:
    

    File Size: 25654469 bytes (24 MB)
    Downloading… 100%
    File Saved (size = 25654469 bytes).
    Returning to M33 updater…

14. Then you will see:
    

    Unpacking… done.
    Please wait…

15. Next you will see:
    

    Verifying 390.PBP… ok
    Verifying u235.prx… ok
    Press X to start the update, R to exit

16. Press the X button to continue the update
17. You will then see:
    

    Verifying 390.PBP… ok
    Verifying u235.prx… ok
    Press X to start the update, R to exit
    Starting the updater. Wait…

18. The PSP Update ver 3.90 screen will appear next, press X to continue.
19. Follow the onsreen prompts, select Accept and keep on pressing the Right Button of the D-Pad until you see the option to press the X button
20. Press the X button to continue the upgrade
21. Next you will see:
    

    Installing…
    Do not turn off the power, disconnect
    the AC adaptor or remove the
    Memory Stick
    0%

22. Once it reaches 100%, you will see this:
    

    Update completed
    Press the X button to restart.
    You can now delete the update data
    from your Memory Stick.

23. Press the X button
24. After your PSP restarts, go to Settings
25. Select System Settings
26. Select System Information
27. You should see something like this:
    

    System Software 3.90 M33-3
    Nickname
    MAC Address

Congratulations! You have updated your PSP online!