This is the most practical solution.
This process is highly technical and involves "micro-soldering" to the console's and Syscon chips. You will need: PS4 Revert Tutorial: Full Legit CoreOS Patch Guide
– If you want to use homebrew or backups, do not update further. A future exploit may appear, but there’s no guarantee. Downgrade Ps4 9.03 To 9.00
A "revert" involves hardware manipulation to force the console to boot from that inactive slot.
This process requires specialized tools and significant technical skill: This is the most practical solution
Before attempting to downgrade your PS4, make sure you've completed the following steps:
Your console must have a Renaissance syscon chip (identified by codes like "A0-C"). Required Tools and Difficulty A future exploit may appear, but there’s no guarantee
Scouring YouTube, Reddit, and shady forums, you will find many videos and threads claiming to have a “downgrade PS4 9.03 to 9.00” tool. Let’s debunk them: