There isn't a 4.00 jb, but I think there might be a 3.55 spoofer for 4.00, and I think its for REBUG, though I'm not exactly sure what that is cause I can't jailbreak my ps3s, 1 is on 4.00 and the other is 3.72, I'm going to sell the 3.72 and then get the money for for a 3.55 PS3

hey mate,

there is currently no way to jailbreak OFW 4.00. If you would like to play online with hacks/mods/ anything you have done on your 3.55 jailbroken PS3, you will have to data transfer it to an OFW 4.00 PS3, then you can use everything online,

if you have any questions, please ask,

Mudkip

spoofer dont give u online access due to the keys not being changed to the 4.0 and if u change the keys ur system will crash so answer to the online is no