Quality - Psp 352 M33 Upgrade To 660 High

While 3.52 M33 was a stable, iconic release, it has severe limitations compared to 6.60/6.61:

Custom Firmware (CFW) 6.60/6.61 is more stable and versatile. Important Pre-Upgrade Checklist

What do you have? (Check the sticker in the battery compartment, e.g., PSP-1001, PSP-2001)

There is no such thing as "PSP 352 m33" – you likely mean 3.52 M33 (a very old custom firmware). The process below works from 3.52 M33 or higher (including 5.00 M33, 5.50 GEN, etc.) to 6.60 PRO-C. psp 352 m33 upgrade to 660

Your current 3.52 M33 save data, ISO files, and plugins may not be compatible with 6.60 initially.

Your PSP will reboot. Go to to confirm it reads 6.60 PRO-C .

Whether you want to configure for your ISOs. While 3

On your PSP, navigate to Settings > USB Connection and ensure it's set to USB Mode .

Battery life stretched like a slow afternoon. Networking found new grooves; ad-hoc lobbies held together through more lapses and distance. The UMD tray clattered less, as though the machine had learned to exhale.

standard, you generally need to transition through the Official Firmware (OFW) first. This provides a stable base for installing newer custom firmware (CFW) like 6.60 PRO-C Phase 1: Update to Official Firmware 6.60 The process below works from 3

Modern tools allow for safe, easily toggled, or completely permanent custom firmware installations on all PSP models. Pre-Requisites and Hardware Check

Built upon the original 3.52 Sony OFW. It introduced the 150.PBP kernel add-on for 1.50 homebrew compatibility but lacked modern features like CID encryption bypass for PSN or ISO cache.

Modern homebrew apps, plugins, and games released late in the console's lifecycle require structural files missing in the 3.xx branch.

Do you plan to run or custom PS1 classics ?

Most modern homebrew applications and plugins (like CWCheat or TempAR) require 6.60+.