Downgrade your PSP system to version 1.5 by turning your PSP battery into a Pandora's battery. You need are an original PSP battery (with more than 50% charge) and a Memory Stick Pro Duo with 1GB memory or above Users can downgrade their PSP to version 1.5 because they can upgrade their PSP to any version from 1.5. If you upgrade your PSP to version 3.51, you can play any downloaded games and run any applications.
6.20 Is not yet downgradable. That's why they developed TN HEN for OFW 6.20 version.
by Pandora stick
There is no way you can downgrade a PSP-300 or PSPgo at the moment.
how to downgrade psp 4.01 version...i used Pandora and magic memmory but no responce from the psp?
No, Pandora Batteries (the only known way to downgrade PSPs) do not work with the PSP-3000, and, as such, you can not downgrade it.
It is not yet possible to downgrade a PSP 3000 series.
well you cant downgrade your psp but if you go to youtube, there are some fantastic videos on how to do it! just type in "how to downgrade psp's" or "psp downgrade"
It s not possible to "Downgrade" A Psp that has already been patched Improved Answer: You can easily downgrade it without the Pandora battery since you didn't update your PSP passed 5.02. I suggest you don't downgrade since it would be worthless to do so.
A downgrade website for Psp
I'm sorry, but you can not downgrade it back to firmware 6.2 Any firmware after around version 5.5 cannot be downgraded i think. It also depends whether you have a psp 2000 or psp 3000 I have a psp 3000 and it was too late for me to downgrade
You can't do it.
NO NOT IF YOU HAVE A NEWER PSP 2000 OR 3000 AND GO but older psp 2000 and all 1000 can downgrade with Pandora battery then hack it and then download 6.35 cfw and install
go to www.customizepsp.com there they will show you different downgrades for your psp.
no