PS3 3.70 Downgrade help?

[killertiger26]

Is it possible to downgrade ps3 from 3.70 to 3.65 or lower?

[NTA]

Honestly I don't think that's possible. There might be a way, just to be optimistic, but it might just be undiscovered.

[superaccount]

It is not possible, currently to downgrade a retail ps3 that is on 3.56 or newer, to any previous version without a hardware flasher type of device. You can check out Progskeet or Infectus.