Im living in America until the summer and I want an iphone 4 for christmas and i want it to work here in the us before I take it to europe. Can I stop the contract and get a new one when I get to europe? Or can I use an american contract provider forever in europe even though im not going to be calling or textig people in the US. Oh and if I do that will it still cost a fortune if I call/text people in europe whe im there while using an american provider?