hi, i have an original Hong Kong version of the psp slim. it is now 3.71 M33. can i used the custon firmware in this website to update to 3.90 M33? i do not need a pandora battery, right? just follow the steps list at the first page? thanks.
yes i have a japanese and a hong kong version both are now 3.90 m33-2
just follow the steps.