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I want to downgrade my PS3 from 4.75 to 3.55. When I try to downgrade with USB, It says The data is corrupted. (8002F157). I can't find any solutions for this. Please Help!

There should be services on eBay and stuff that will jailbreak your ps3

I'm in a similar situation. I jailbroke my ps3 a long time ago and forgot about it. Then recently I accidentally updated to 4.75 ofw. So since I toggled QA back when I was on cfw, I thought I could just install a cfw or even downgrade, but apparently not? Will I have to downgrade with my e3 flasher again? I'd rather not since it's a pain having to take apart my ps3, but I'll do it if I have to.

u r in same boat as TC..so my answer is the same as what i quoted for original poster !

Alright, thanks mate! I just wanted to know for sure before I went and did anything.

Hi,
First off, were you DEX or CEX. Second, what the system Q.A, Third, as long you didn't update your console while disc in it, it can be recovered. goodluck, let us know how things work out.

I think its CEX. Are you saying that i can recover ps3 like windows restore point?

Is it possible to downgrade PS by restoring file system?

No you will need an e3 flasher

then i will stay without jaiblroken ps3 . E3 flasher cost like half of my ps3 price