Sprint has partnered with renowned artist, photographer and influential Instagram photographer Paul Octavious on "Built for Chicago," a local photo/video contest that lets you test your creative chops. Starting Sept. 16, Sprint will unveil a series of 15 different creative challenges for Chicagoans. To participate, Chicagoans can respond to the challenge by Tweeting a picture or Vine video to the hashtag #builtforchicago. The ultimate prize -winners of "Built for Chicago" will have their work di...