Downgrade psp phat with firmware 3.10 OE-A'

i need major help downgrading my phat psp to 1.5 so i can update it to official firmware..any help is greatly appreciated!! thanks!

first of all welcome to the brew..

2nd u dont need to be on the lowest firmware to go to official firmware...

thank you..so could you possibly guide me to a link or something to get the latest official firmware? i think its 6.20? im not 100% sure on that

the safest way would be to use the network update feature in ur psp... (that is if u have wireless)


anyways here you go . just to tell u, once u get to OFW u will not be able to play any isos, and will not be able to run homebrew...

and please do stay active on the brew.

alright so i placed that file in the folder correctly with the folder having all upper case letters..the update starts but then comes back to the home menu and says "The game could not be started. (DADADADA)

that normally doesnt happen with updates...

put a umd in your umd drive then try again.