L'équipe E3DIY l'a fait! en utilisant leur produit l'E3 FLASHER , ils ont réussi à downgrader depuis le firmware 3.70, vers le firmware v3.55.
Selon l'équipe E3DIY, le processus de downgrade prend seulement 5 minutes environ et sans aucunes soudures sur les modèles "Slim" (les modèles "phat" elles, nécessitent quelques soudures).
E3DIY team announces a successful Slim Downgrade v3.70 to v3.55 with our new E3 FLASHER!
In only FIVE minutes, the whole downgrade progress was completed!
Time is short and operation is very easy, this is because of our exclusive special E3 FLASHER design:
* ONE-Button Operation and NOR Flash onboard!
* E3 FLASHER compatible all NAND FLASH and NOR FLASH consoles
* With SLIM Consoles, no need for any soldering!
* But with PHAT Consoles, some soldering will be needed!
In this video there no images of the E3 FLASHER as we need to keep our design under wraps until it is ready for release, I hope everyone understands.
The official version should be released next week, at that time there will be more videos and pictures and everything will be available to the public.
Source : http://jailbreakscene.com/main/2011/08/ps3-firmware-v3-70-downgrade-to-v3-55-with-e3-flasher-device-video-no-soldering-on-slim-ps3/