To move from 10.50 back to 9.00, enthusiasts use a method known as "Syscon Revert." Every PS4 has two firmware slots: the active one and the previous one (backup). 1. The "Previous Version" Luck
Impossible. Unless you are a hardware engineer with a launch-day PS4, this is not viable. ps4 downgrade 10.50 to 9.00
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