all depends where you get in from most shops were asked to update by sony when 3.55jb came out but a brand new ps3 will be on 3.60+ you will be lucky if you get 1 lower than that. But should you want to jailbreak it you an ex flasher or progskeet and downgrade to 3.55 when ever you want or you can buy a 3.55ps3 jailbreak it put your patches on and update it to 4.25 or just wait for the 4.21jb dongle