LG is expanding its solid 4G LTE presence with the introduc- tion of its new Optimus F Series at Mobile World Congress (MWC) in Barcelona. With LG’s industry-leading LTE technologies, the Optimus F Series is designed to bring a premium user experience and the speed of 4G LTE to a mass audience. Two devices -- Optimus F5 and Optimus F7 -- will make their global debut at the show...