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No, you must use a Pandora's Battery. Only PSP firmware 3.50 or below can have custom firmware flashed over it without using a Pandora's Battery and Magic Memory Stick. With 3.50 and below you can use a Lumines UMD. With 3.03 and below you can use an unpatched GTA: Liberty City UMD. With 2.81 and below you can use HEN. ---- I wrote a guide here for downgrading without a Pandora Battery:

http://honorshard.com/blog/2009/03/01/downgrade-psp-with-official-firmware-without-a-pandora-battery/ Feel free to check it out and if you like it please share it.

I had OFW 4.05 and successfully downgraded to 4.01 M33-2 without a Pandora Battery!

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15y ago
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15y ago

Yes you change downgrade your psp from 3.90 to 3.71 M33-4 but make sure you download the OFW. Put it in your updates. It has to be version 5.00 OFW. Then you must UPDATE it. Once you done close your psp. Load it back up and download 3.71 M33 from dark alex and just put it in your (game folder). You just got 3.71 M33!!

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16y ago

Dude im sorry i cant answer this howe ver im in the same delima so if you dont mind email me at monsterc13@GMAIL.COM when u get the answer plz gh

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13y ago

Yes. Use Hellcat's Recovery Flasher on a HEN'ed or CFW PSP.

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15y ago

i think it can't be done yet.. maybe in the coming months it would be possible but as of now, it is impossible to downgrade psp slim with OFW 4.21 even with pandora's battery,,,

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12y ago

Unfortunately, no. No firmware version that is over 5.03 can be downgraded without a Pandora battery and a magic memory stick.

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13y ago

You cant. I tryed, you need to have a 2000 to downgrade it.

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13y ago

Simply, you can not.

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13y ago

You can't, even with the battery.

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Q: Is there any way to downgrade psp firmware 6.20 to firmware 1.5 without Pandora's battery and magic memory stick?
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Related questions

Can you get custom firmware if your psp is official firmware is 5.51 without Pandoras battery or any other device in other words how can i get it?

No, you can't. And even with a Pandora Battery, you cannot downgrade the 3000 or the late 2000 model.


Can you install custom firmware on a psp running on 4.05 official firmware without using a Pandoras battery?

definitely no the best u can downgrade without a Pandora battery is 3.03.... what you can do is use the Pandora battery to downgrade and the results will be great I've done it on my psp and when i downgraded my psp i got to download as many games that can fit into my psp(full games of course) so downgrade your psp using a Pandora battery:)


How can you downgrade your psp 3000 with firmware 6.30 to 5.00 without Pandora battery?

You can't, even with the battery.


Can some one explain in detail how to custom firmware a psp without bricking it?

Make or buy a pandoras battery


How do you downgrade psp 4.00 using a slim battery?

you can't but im trying to see if u can because my psp slim is ver. 3.93 and im trying to downgrade it to a lower version probaly with a Pandora battery but I'll see if its possible to downgrade a slim without a pandoras battery


Can you downgrade an iPod touch without restoring?

No. You must restore to Downgrade the Firmware!


How do you downgrade from 6.00 firmware to a hacked version without using Pandora's battery please help ive upgraded?

You can't. You couldn't even if you did have a Pandora's battery.


How can i get custom firmware on my official sony firmware 5.51 slim psp without a pandoras battery using chickHEN R2 and hellcats recovery flasher?

You cant yet, We will have to wait for it to come out maybe late this year We shouldn't have upgraded to 5.51


How do you downgrade Samsung Galaxy s2 without rooting?

To downgrade Samsung Galaxy S2 without rooting, simply download the appropriate ICS 4.0.3 firmware, preferably from sammobile.com, and flash the gadget using Odin.


Is there any way to downgrade psp firmware 5.51 to firmware 3.95 without Pandora's battery and magic memory stick?

Nope, but I would look into getting a Pandora's Battery anyway - it's dang useful, and if you own a bunch of old SNES games, you can play them on the go. As for your original question, however, I'm afraid it's not possible.


How do you put custom firmware on a official 3.93 psp?

you cant, you need 3.03 or below to downgrade without Pandora stuff.


Is it possible to downgrade ps3 to firmware 3.55 without e3 flasher?

no the PS3 can not go backward to an earlier configuration after an update like you can a pc