Boot into Safe Mode (hold power button until second beep). Select option 7: “Update System Software.” The PS4 will tell you which version it needs (e.g., 11.00 or 10.50).
Neither file works for downgrading once the console has seen a newer firmware version. The PS4 compares the version number in the PUP header with the stored minimum version in syscon/NOR memory. If the offered PUP is lower, the console rejects it within seconds—triggering the “1302” style of frustration. ps4 downgrade 1302 upd
You might see a message in PS4 Safe Mode (option 3: Update System Software) when trying to install a lower firmware: Boot into Safe Mode (hold power button until second beep)
, to access and manipulate the console's internal flash memory. Core Requirements and Limitations Previous Version Only ps4 downgrade 1302 upd