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Home PS4 News - Latest PlayStation 4 and PS3 News

PS3 Slim 3.70 Unit Downgraded to 3.55 Kmeaw Custom Firmware


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189w ago - Today Italian site DiGiTaLAnGeL (linked above) reports that they have successfully downgraded a PS3 Slim 3.70 Firmware unit to 3.55 Kmeaw Custom Firmware, followed by a New Method - PS3 Downgrade v2 Supports all NOR Flash from TwoStone.

Similar to the PS3 Firmware 3.6x Downgrade via Infectus, this round they have downgraded a PlayStation 3 v3.70 Firmware console using ProgSkeet with the assistance of Dospiedra with a roughly translated PS3 3.7x Downgrade for Slims and Fats with NOR Flash now available.

To quote, roughly translated: The first downgrade to 3.70 on PS3 Slim 3:55, DiGiTaLAnGeL tested by us!

For the first time, we have been involved in something truly spectacular We were the first in the world to test the downgrade from 3.70 to 3:55 on a PS3 Slim (With flash memory, "NOR") using the ProgSkeet and patched some files provided by dospiedra, a famous Spanish coder already riding high for having discovered the method of going back to 3.55/3.41 with the PS3 (FAT flash memory "NAND").

After several attempts, in collaboration with dospiedra, we got to go back from 3.70 to 3:55, enter the factory mode with a simple key to jailbreak, rifleshare a modified version of 3:55 to prevent the SYSCON (the registry in between downgrades) was consulted during the downgrade and now we are happily at 3:55 KMEAW!

With this version of moddata 3:55, you can perform a memory dump today and you can switch on the fly from 3:55 to 3.70 without having to do this all the time-consuming process: using progskeet fact you can go straight to 3.70 changed to 3:55!

Dospiedra said it will release details on the patches applied to the NOR and the update file as soon as possible.

New life for those who arrived too late to enjoy the benefits of the 3:55?





PS3 Slim 3.70 Unit Downgraded to 3.55 Kmeaw Custom Firmware

PS3 Slim 3.70 Unit Downgraded to 3.55 Kmeaw Custom Firmware

PS3 Slim 3.70 Unit Downgraded to 3.55 Kmeaw Custom Firmware

Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter, Facebook and drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene and PlayStation 4 scene updates and fresh homebrew PS3 Downloads. Enjoy!

Comments 95

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#65 - michael040990 - 188w ago
michael040990's Avatar
and i wanted to be original darn lol great minds think alike also if you didn't want to go through all the trouble of the dual nand you could always hock your infectus up permanently to your ps3 and then make a new mini usb port on the back of your ps3 buy cutting and wiring up a male usb to female mini usb then use a usb to mini to cook it to your computer when you need to flash.

i wish i could afford one of these chips i'm thinking about putting all the information i read about in this fourm and others in one organized website dedicated to downgrading and mods i need help extracting all the pertinent information though.

#64 - HeyManHRU - 188w ago
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Something like what you just said was supposedly accomplished, look here - http://www.ps4news.com/forums/ps3-hacks-jailbreak/ps3-hackers-dual-firmware-bring-3-6x-key-decryption-cfw-119534-4.html

... and look on page 6 in the same thread I linked you to.

#63 - michael040990 - 188w ago
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when all is done im going to make a chip switch i'll buy a identical nand set and put 3.70 on the original and 3.55 on the copy soldered to a daughter board also a hard drive cable split when you flick the switch it changes from one harddrive plus nand to the other harddrive and nand no need to reflash every time. how does that sound.

#62 - marmar - 188w ago
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I think imma do it too

#61 - Marsupilami - 188w ago
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I've got a PS3 with CFW3.55, can I install CFW3.55 no check and then swap the HDD and install OFW3.70?

I don't have Progskeet and I don't want to have it btw...

#60 - michael040990 - 188w ago
michael040990's Avatar
ok first off i would like to say hello this is my first post here at ps3news and i am excited to be involved in any projects. that being said, would it work if you take the same model ps3's one with firmware 3.7 and the other at 3.55 and dump the 3.55 nand firmware and write it to the 3.7 nand chip using something like INFECTUS or progskeet will that downgrade from 3.7 to 3.55? or is there more details about it i need to know/edit?

#59 - trykenter - 188w ago
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I think my PS3 is old enough to try to crack open.

Thanks!!

#58 - mushy409 - 188w ago
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Think you're confusing this method with the 3.70 NOR downgrade method - as I stated earlier, this method work ONLY with the 256Mb NAND consoles CECHA up to CECHG (phattys)

The other guide doesn't involve the Infectus as it doesn't support NOR flash. You'll need to be looking into buying a progskeet...

#57 - joffe - 188w ago
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Quote Originally Posted by adrianc1982 View Post
I hope we get this method for the fat ps3s, but somehow I doubt it since they have the complete flash in the ps3 and not on the hdd. Correct me if I'm wrong...

This method should also work for CECHH and later FAT models - they have also 16MB NOR-flash. Fatties CECHA..CECHG need another method.
Quote Originally Posted by adrianc1982 View Post
But great fo those ps3 slim users because they can go ofw and back to jb mode with a couple of hours of work...

Swapping HD and flashing proper image.bin won't take hours. Cool would be to glue a PCB with 16MB NOR flash and connector to HD so you would swap the proper flash the same time you swap the HD
Quote Originally Posted by HeyManHRU View Post
There is no need to use this tutorial if you have Kmeaw CFW.

With this method you can use CFW with it's advantages or swap to 3.70 and go onlline.

#56 - mushy409 - 188w ago
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Quote Originally Posted by clementz View Post
How about new type of ps3 slim? Does this working with the new ones?

No, the Infectus downgrade method is for the older NAND consoles. The new consoles are NOR based which require a progskeet or similar to interface with the flash.
Quote Originally Posted by tysinb View Post
can we make CFW from this just wondering?

No, no, no.... This is simply to downgrade your console to the 'special' firmware versions (for jailbreaking/installing CFW) such as 3.41 or 3.55 (or whichever you choose)







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