4 Responses to “How do I install 4.00 Firmware on my PSP 3.90 Firmware?”

1. Anthony M Says:
   June 6th, 2010 at 4:59 am

   Wifi? you can update online. It is completely safe to instal it, but make sure your battery is charged.

   But you dont have to update… Everything works perfectly fine with 3.90.

2. ZeroGurl Says:
   June 6th, 2010 at 4:59 am

   PSP Help Site:

   http://www.us.playstation.com/Support/PSP

3. sity_frogs Says:
   June 6th, 2010 at 4:59 am

   YA 3.90 IS FINE, ITS JUST THAT 4.00 SOUNDS COOLER TO SAY.

4. difel from aymail.com Says:
   June 6th, 2010 at 4:59 am

   u can update it by buying new games or by the internet

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