Sprint's LTE network has been slow to roll out with only 15 cities up and running so far. On the company's conference call this morning, it divulged an unusual culprit: Birds! It seems that birds are living all up in Sprint's LTE towers and hampering your 4G coverage. We're so glad human incompetence and technical problems have nothing to do with it. Curse you birds! [Sprint Conference Call via Engadget]