The Dow Jones reports that Sprint CFO Joe Euteneuer said today at an investor conference that the company is free to offer a potential future Apple iPhone using 4G LTE, though he didn't say explicitly whether Apple had such an iPhone planned. The terms of Sprint's gargantuan iPhone gamble are still mostly a mystery, but Euteneuer also revealed that the company's contract with Apple is similar to those held by AT&T and Verizon, which could mean that Sprint's arrangement includes future Apple devices. The notion of a Sprint LTE phone is somewhat strange considering its unique LTE situation: Sprint plans to overlay LTE with CDMA and is also waiting on Clearwire to roll out TD-LTE alongside WiMAX at 2.5GHz, which is enough to make one's head spin. Obviously this should all be regarded as rumor at this time, but we'll keep our ears to the ground on any additional 4G iPhone rumblings.