I'm trying to decide if I'd rather buy the iPhone 6 outright or do the monthly payment thing through T-Mobile. So let's say the iPhone costs $648 total retail (for math purposes) On the T-Mobile Jump plan, you would pay $27/month for 24 months to pay it off completely ($648). If you choose to stop after 12 months, you will have paid a total of $324... which is half the retail price. However, you will also have paid $120 in Jump costs ($10 x 12 months). Bringing your total out of pocket expense to $444. You then give the phone back to T-Mobile assuming it's in good condition... and you're done with the iPhone 6 and can get the iPhone 6s or whatever new phone is out at the time... repeat the entire process above. Is all of this correct? The alternative option would be to just buy the phone outright for $648 and OWN it. Then, when the iPhone 6s comes out in a year, you could probably easily sell the iPhone 6 for at least $400-$450 on Craigslist or eBay or Swappa... meaning you would be spending around $200-$250 total out of pocket every year. The second option sounds a lot better to me... but maybe I'm missing something?