hi. im from mexico city and i have an iphone 4 16gb last firmware (i think). i need to know if it is possible to take my iphone with me to norway an then buy a micro sim of norway and use it there prepaid or something. is it possible?

do i need to jailbrake it? or can i just change the sim and use prepaid service.

i dont want to make a jailbreak. can i? ive been told that maybe without jailbreaking it i can only use it for text and calls.

did anyone of u guys have been in norway or europe and make some of this movements? i need some advices or comments about what to do!.