How to downgrade psp firm ware 9.90 without pandora battery step by step

You will need a Pandora Battery in order to downgrade the PSP. You can make them yourself, but I recommend against it, as I have tried this method and have been left without a working battery because of it. These links will help. You can buy a Pandora Battery at the second link.

http://www.wikihow.com/Downgrade-a-PSP

http://www.psppandorabattery.com/

Hi There!
Honestly, downgrading the firmware is tedious compared to upgrading it. I would suggest you have someone who has the technical knowledge to do this. Failed downgrade could lead to a bricked psp. Which will render it useless. Some can be reflashed and will work back while some cannot.
However, you can purchase a Pandora battery for you PSP. Remember: You CANNOT downgrade your PSP with any firmware higher than 3.50 without a Pandora's Battery.
You may check this link for a self-help guide in making your own Pandora battery. This is for a PSP slim model.
http://forums.maxconsole.net/showthread.php?81424-How-to-create-a-Pandora-Battery-and-Slim-Mem-Stick-WITHOUT-a-Phat-PSP!
Hope that helps!

I am afraid this is not possible, if it is a PSP 1000 or 2000 you would need a pandora battery. However if it is a PSP 3000 upwards there is no way to downgrade the firmware at all. Anything above firmware 5.03 is not possible to downgrade on a PSP 3000.

Hope this helps

how can i downgrade my psp version 6.31 without using a pandoras battery?

PSP 2000 CAN BE DOWNGRADED BY PANDORA BATTERY BUT "NOT THE 3000"....AND PSP 2000 CANT BE 3000..............!!!!!!!!!!!111

You can use ChickHen R2 to downgrade your PSP without a pandora battery. You need also to download the ofw ver. 5.03 and cfw 5.03 GEN-C to hack your PSP. You can find many ChickHEN R2, cfw 5.03 GEN-C and step by step instruction in the internet.

the 6.20 firmware is now un-downgradable

There's various methods of doing this to be honest.

The best one I have is one I used a couple of years ago here...

http://pspupdates.qj.net/Tutorial-How-to-unbrick-your-PSP-via-Pandora-Battery/pg/49/aid/100693

It tells you step by step what to do. It will take a while so make sure you set aside a couple of hours for it!

I will also email you the link just in case it doesn't work on here.

Best of luck dude.

Craig

Im pretty sure you cant downolad free games for the PSP safely. If there is a website offering this, i would watch out for harmful software that is with it such as viruses.

download utorrent, look for an iso file... BUT, you need cfw (custom firm ware) on your psp, to get this you need a pandoras memory stick and pandoras battery. The memory stick is simple but the battery you have to open up and cut a pin on the motherboard, hard mod it per say. I suggest you look for a tutorial on this. If you have 1.5 firm ware on your psp already or custom firmware on your psp already then you dont need any pandora.