The only Sprint phone on the list of 2015 top 10 smartphones is the LG G Flex 2. At a price of $504, the phone features a curved display and a blazing fast speed of 1.5 GHz. Its battery life, 6-1/2 hours, provides excellent performance even on long trips. Its finish is also unique, made from a material that automatically covers tiny scratches. Its call quality, though, put it out of the Editors’ Choice range.