Psp 352 M33 Upgrade To 660 Portable May 2026

After this, your PSP will be on official firmware — no homebrew will work yet.

Unlock Full Compatibility, Modern Features, and New Game Support

If you’re still running 3.52 M33 on your PlayStation Portable, you are sitting on a piece of history. This custom firmware, released back in 2007, was revolutionary for its time. However, in the years since, Sony released numerous official updates (up to 6.61), and the homebrew scene has evolved dramatically. psp 352 m33 upgrade to 660 portable

Staying on 3.52 M33 means you cannot play newer UMD games released after 2008, many PlayStation 1 eboots run poorly or not at all, and you miss out on critical modern features like permanent patching on non-2000/3000 models, improved memory stick compatibility, and better plugin support.

Upgrading to 6.60 PRO-C or 6.60 LME (Light Edition) is the single best performance and compatibility upgrade you can give your old PSP. This guide will walk you through every step, from understanding your PSP model to safely flashing the new firmware without bricking your device. After this, your PSP will be on official

Note: This guide assumes standard "Phat" (1000) or "Slim" (2000) models. If you have a PSP 3000 or PSP Go, the process requires a "Permanent Patch" tool that runs on every startup.

You cannot install 6.60 PRO-C directly over 3.52 M33. First, you must update to Sony’s official firmware. Unlock Full Compatibility, Modern Features, and New Game

If you’re still running the legendary 3.52 M33 custom firmware on your PlayStation Portable, you’re using a piece of history. However, many modern homebrew apps, plugins, and game backups require a newer firmware. Upgrading to 6.60 PRO-C (often referred to as “660 Portable” in the scene) unlocks full compatibility with the PSP’s final official firmware while retaining all custom features.

This guide will walk you through a safe, step-by-step upgrade process.