(3BL Media/Justmeans) - One of the top U.S. cell phone carriers is amping up its purchases of alternative fuel vehicles (AFVs). AT&T is halfway to its goal of deploying 15,000 AFVs over a 10 year period ending in 2018. Since the company began investing in AFVs, it has purchased 7,500 in 44 states. Part of the goal is to invest in 8,000 compressed natural gas (CNG) vehicles by 2014. The fleet already consists of 5,474 CNG vehicles.