please help!!!

[MustangMustang]

im sooo sorry if this has been posted already but im at work and didnt have time 2 search thru...
i have an unlocked iphone i got on ebay...
i stupidly tried to download verion 2.0 last night and now my phone is locked i have searched all over the net and cannot find anyhing to help me...
all it lets me do is make emergency calls.
im in australia if that makes a difference.
i called apple and they say i need the AT&T sim card that unlocked it...
if someone could give me a site to go 2 or anything i would love it
please help me!!!
thanks
Mustang

 

[abijnk]

You could try to pwn it with pwnage 2.0. Not sure if it will matter that it's been unlocked before.

 

[MustangMustang]

would this be eaiser to do on a mac o sx or windows xp???
im new 2 a mac so not really that quick around it.
any other suggestions would be great
cheers
Mustang