If you see a YouTube video claiming otherwise, it is 100% a scam asking you to download a virus or subscribe to a paid service.
This involves physically modifying the console's motherboard to force it to accept an older firmware file. This is a software hack; it requires soldering skills. ps4 downgrade 1302 to 900
: This process requires opening the console and soldering to the chips. It is not recommended for beginners. Safe Mode Limitations : Using a USB in only allows for "Reinstallation" of the firmware; it will reject a 9.00 file if you are on 13.02. Necessary Equipment If you see a YouTube video claiming otherwise,