Its a 4G iphone and I live in the Uk, could anyone expand on that please? thanks for the answer though.

Hey guys, I broke my iphone recently by dropping it, the screens now cracked and I don't have a clue where to get it fixed or how much its going to cost.. can someone tell me: a) where can I get it fixed? b) how much it will cost for just an exterior screen repair? c) has anybody here had the...