Can you pay more than the minimum with Best Buy financing?

I'm going to buy an Iphone 5 from Best Buy with the intent of financing it. Now my question for anyone who has ever financed something from Best Buy or works there and can answer my question. The 18-month no interest financing option is the one I would be going for and it estimates payments to be around $42 a month (with no interest if paid within those 18 months). If I'm able to put down more than minimum each month? Because around my birthday and Christmas I'd just like to throw in any extra cash towards that debt so that it could be paid off sooner.

Added (1). Http://www.bestbuy.com/site/Global-Promotions/18-Month-Financing/pcmcat163300050048.c?id=pcmcat163300050048

It not only works but is a terrific idea.yes, I've done exactly the same but with major appliances, it'll be great for you credit report too. Good thinking

Of course you can make more than the minimum payment due.

What you have is basically a store credit card. You can pay it off in full tomorrow or make monthly payments in any amount you like as long as they are at least the amount that equals their minimum payment due.

Be careful to pay it off at least one month before that 18 month, no interest period. If you make a payment just one day later than that date… They will add all the interest charges due for the last 18 months to the balance you just paid off and that can get expensive.