When T-Mobile finally began offering Apple’s iPhone 5 last month it did so in dramatic fashion, undercutting AT&T by $70. The iPhone 5 could be had for a down payment of $99 with monthly payments of $20 for 24 months, totaling a competitive $579.99. The launch price was only part of a one-month promotional offer, however. According to a leaked document obtained by TmoNews, a 16GB iPhone 5 will now require a down payment of $149, totaling $629 after 24 months. T-Mobile would later confirm the report. Both the 32GB and 64GB models are also set to see down payment increases to $249 and $349, respectively, and monthly payments for all three models will remain unchanged at $20 per month.