Put your PS3 into (hold the power button until you hear two quick beeps). Select System Update and follow the prompts. Step 4: Reverting to 4.88 Official Firmware (Optional)
The console will display the minimum version it can support. If it says , you are good to go. Step 2: The CFW Toolset Method
The PlayStation 3 modding scene remains active, but Sony’s 4.89 firmware update introduced specific hurdles for those looking to revert to older versions or install Custom Firmware (CFW). If you are looking to downgrade from 4.89 to 4.88, the process is not as simple as clicking "undo." It requires specific hardware compatibility and software exploits. Can You Downgrade Any PS3? No. Before starting, you must identify your console type. Most are downgradeable. how to downgrade ps3 firmware 4.89 to 4.88
You can then take an official 4.88 update file and install it over the CFW.
If your goal was to get back to a "clean" 4.88 Official Firmware (OFW): Install the 4.88 CFW first using the steps above. Once on CFW, the system restrictions are gone. Put your PS3 into (hold the power button
Do you know the or date code of your PS3 to confirm if it supports this process?
Always verify the MD5 hash of your firmware files to ensure they aren't corrupted before installing. If it says , you are good to go
Plug the USB into your PS3 and attempt a System Update via Storage Media.