Upgrading a PlayStation Portable (PSP) Go to product viewer dialog for this item.
Enter the Recovery Menu (hold the Right Trigger while booting) and disable all active plugins to prevent interference with the update process. Phase 2: Updating to 6.60 Official Firmware (OFW) psp 352 m33 upgrade to 660
Updating from such an old custom firmware directly to 6.60 can occasionally trigger compatibility errors. Before starting, ensure the following: Upgrading a PlayStation Portable (PSP) Go to product