The Lumia 920 isn't the only Nokia Windows Phone gracing AT&T shelves this winter, even though it receives the lion's share of the attention. In its shadow sits another perfectly capable device, the Nokia Lumia 820, currently going for $50 with a two-year commitment. Frankly, there isn't much that makes this carrier-branded model different from its international twin, aside from a few minor cosmetic and internal changes. After the break, we'll outline what makes AT&T's L
