Upgrading 3.71 M33-2 to 3.90 M33-3

[sharva650]

hello everyone
I have a psp slim with a pandora battery and cfw(3.71 M33-2)
I want to upgrade my 3.71 m33-2 to 3.90 m33-3.
I don't know if this helps or not but i have a psp slim.
How can i do this
I am noob, so please make it as simple as possible
Thank you to everyone in advance

[davewill]

Here is a link for a tutorial,once your on 3.80m33,check that the m33 network update is enabled in recovery & do a network update or follow the tut all the way to 3.90m33.
http://www.pspmod.com/forums/custom-...m33-guide.html (step by step-1.50 to 3.90m33 guide)