Hi there i have a iPhone 3G 16GB 3.1.2 (i will use it in Switzerland)

One week a go i had a CFW which was pre-activated, because i could not activate the iphone by my own sim
because it says in itunes: sim was not supported.

but the problem was:
the iphone didn't found any service -- it made me driving crazy...


so i try i try i try and i putted a not activated firmware on my
iphone 3g, and tried to activate it by my card... but i can't activate it :-S
my sim doesn't support that.

and if i wanna make it with a CFW via iTunes again there are a few errors...
i tried so many things that im looking for another way...


is there any other way to do that without itunes?
for example with Redsnow?

please help me