It depends on where you go and whether or not you have credit, and if you do have credit, whether or not it's good. If you have bad credit, you may not be able to get a contract at all, or you'll have to pay something like $750 or more as a down payment. If you have no credit, which you probably don't if you're not 18 yet, then it will be less, but still could be really high - like $500 down payment. Of course, that's at a place like Wal-Mart. There are probably much better deals out there.