How to update M33 PSP version?

Question

can i update my psp to m33 version form version 1.00?

Answer 1

yes u can but simply don't choose the highest version , just choose one after one

Answer 2

you cant do it you don't update to custom firmware by simply sticking in the cfw and there is no down grader for 3.71 and there is no custom firmware for 3.71 if you want custom firmware the first thing you need to do is stop updating to newer sony firmware    :)ava06

Answer 3

I think you need to upgrade to 1.50 first then you can go to the m33