Ps4 Tool Downgrade V1.00 [upd]

Depending on the specific method used by v1.00, you may need a Teensy++ 2.0 or a Raspberry Pi to interface with the PS4’s motherboard. Step-by-Step Overview (General Procedure)

Every PS4 contains two "slots" for firmware. When you update your console, the new version is written to the inactive slot, which then becomes active. The old firmware remains in the other slot, effectively hidden. To downgrade, you must: ps4 tool downgrade v1.00