The tech industry is trying to push higher and higher resolutions into devices, even those as small as smartphones. We now have 2K displays on smartphones and Sony just revealed the world's first smartphone 4K screen. But while the entertainment industry is doing its best to catch up, there could be a new bottleneck soon: network speed. To be more specific, the maximum speeds that our small smartphones can support. Fortunately, Japanese electronics giant Fujitsu might be on the cusp of a breakthrough, with an ultra fast receiver module small enough not to bulk up smartphones.