Sprint has found that it is to their benefit to lease their customers a handset rather than selling them one. The wireless operator has a new program called Sprint Flex that allows customers to lease a phone and upgrade to a new model after 18 months. For $5 a month extra, subscribers can upgrade after just 12 months. Note that Apple iPhone and Samsung Galaxy models are entitled to a 12-month early upgrade without having to pay the extra $5 monthly.

Other options available at 18 months include paying off the device with one lump sum payment. Or, by paying six more monthly payments, subscribers … – Source