I am currently in US running 1.1.4 Jailbroken on my Iphone.

I am going to europe and want to know what I need to do if anything in order for my jailbroken iphone to work in europe. I didn't really want to contact tmobile about it because I know I"m not supposed to have tmobile on a iphone.

I was also curious how tzones would work over there and if i would still be able to connect to TZones or if I would be charged per MB.