Mint Mobile (formerly Mint SIM), one of many popular MVNOs (Mobile Virtual Network Operator), uses T-Mobile's growing 4G LTE network to do something wonderful: eliminate the overhead, the confusion, and in many cases the "loudness," of the network it connects to. Mint Mobile sells unlimited talk and text with every package, along with a monthly allotment of data in 2GB, 5GB, and 10GB bundles. That's not unusual, right? But what is unusual is the way it's sold: in order to provide epic discounts, Mint Mobile sells service in three, six, and 12-month chunks; the more you pay for in advance, the cheaper the monthly service.