The Lumia 520 completes the roll call for Nokia’s second generation of Microsoft-powered smartphones. Statistically, this means that every step of their product line, from 5** all the way to 9**, has been backed up by a fresh WP8-rocking alternative. OK, that’s nothing out of the ordinary and actually well on time. The Lumia 520 was announced at this year’s MWC, along with the Lumia...