If you prefer the newest version, you can follow the same steps above but use the 6.61 Official Firmware and corresponding 6.61 CFW.
: If a standard Pandora Battery doesn't work, your PSP is "hard-bricked." This is more serious and usually requires a hardware flasher or a professional repair service.
Follow the instructions to flash the firmware. Once completed, press Cross (X) or Circle (O) to shut down or restart the console. Your system software will now read . Step 3: Upgrading to Official Firmware 6.60 psp 352 m33 upgrade to 660
Upgrading a PlayStation Portable from the legacy custom firmware (CFW) to the modern 6.60 standard is a critical step for modern homebrew compatibility, better PS1 game emulation, and access to newer titles. Prerequisites & Preparation
Before starting, gather the essentials:
Most modern guides assume you are on at least 5.00 M33-6. If you run the official Sony 6.60 updater directly on 3.52 M33, the system will likely crash or throw a region error. The old M33 firmware uses a different NAND structure and IDS storage method that Sony patched out years ago.
Now that you are on 6.60 Official, you need to re-enable homebrew capabilities. If you prefer the newest version, you can
: Ensure your PSP is charged to at least 78% (preferably 100%) and kept plugged into a power source during the entire process. Check for obstructions
If you encounter issues:
Many M33 users encounter an error stating their version is 9.90, preventing updates. This was a "spoof" meant to stop Sony from forcing official updates. Completely shut down the PSP.
Your PSP now shows "6.60 PRO-C" in system information. You can run ISOs, homebrew, and all modern PSP software. Once completed, press Cross (X) or Circle (O)