Apple ipod

Is it a new 3G iPhone with firmware 3.1.3 (7E18) is jailbroken?

I'll get one tomorrow and I've heard about the same as the New PSP motherboard, which can not be hacked. So it can be jailbroken? PS Do not give me answers short, as "the use blackra1n" or "use redsn0w "or something like that. I need someone who has experience in this field.

3.1.3 can not jailbreak the iPhone 3G. If you get the iPhone 3G, provided can jailbreak 3.1.3

Downgrade iphone 3G,2G,1G and itouch 1G,2G 3.1.3