I talked to someone in the apple store about that possibility and she hardly recommended not to do that, coz canceling a contract will lead to a negative entry in my U.S credit history. Is that true?
Not sure what they are doing as of today, but in 2005, I cancelled my contract with Cingular (AT&T's old name) because I wanted the Palm Treo 650 (the best phone out there before the Iphone came out) and only Sprint had it (when it first launched).
Bottom line, no comments on my credit. I paid them the money they were due and they never mentioned it again.