I am in USA & I am planning to buy new factory unlocked IPhone 4 from canada, however before buying one I have a question regarding its warranty. If something goes wrong with IPhone 4, can I get a replacement/repaired here at apple store USA as it carries international warranty? Also Would the replacement be factory unlocked? I did try to speak with Apple Reps, but they didnt have answers and the agent refused to transfer to his manager... Has anyone faced similar problem? Need your advice!!