Oh, the things modern mobile phones can do. They are music-playing, video-taking, direction-providing multimedia powerhouses. But many people have trouble getting them to perform their most basic functions, like making phone calls.
The underlying problem, industry analysts say, is the complex quilt of the nation’s wireless networks. The major mobile carriers have spent tens of billions of dollars on new voice and data networks that they advertise as superfast wireless express lanes. But analysts say these upgrades present major engineering challenges, and the networks often underperform.
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