We saved the biggest failure for last. Microsoft's Kin phone had the perfect setup for a colossal flop, from heaps of hype (the Verizon-Microsoft collaboration was once rumored to be an iPhone-killer) to a splashy marketing campaign aimed at cool teens and twentysomethings. But the product itself had the limitations of a feature phone —no video sharing, GPS, or apps—despite smartphone data pricing. The Kin was discontinued after just six weeks, though it recently made a comeback with stripped-down features and cheaper subscription plans. We suspect that Microsoft and Verizon are just dumping old inventory.