I notice you’re asking about , specifically mentioning “paper” — possibly meaning a paper-based guide or a paper trick (like the PS4 jailbreak paperclip method).
Here is the deep technical breakdown of why this is the case, the specific changes introduced in 9.03, and the only theoretical (and highly risky) methods that exist in the modding community. downgrade ps4 903 to 900 fix
The short answer is . There is no "update.pup" file or DNS setting that can trick your PS4 into installing 9.00 over 9.03. Sony’s security prevents the console from installing any firmware lower than its current version. Any website or video promising a "9.03 to 9.00 software downgrade tool" is likely a scam or malware. The Only "Fix": The Hardware Revert Method downgrading a PS4 from firmware 9