When Nokia's Lumia 900 debuted on the AT&T network in the spring of 2012, the Windows Phone handset had the makings of a viable contender to the iPhone/Android duopoly. Its specs -- 4.3-inch AMOLED display, LTE, and an 8-megapixel Carl Zeiss lens -- were impressive for a $100 phone. But the Lumia 900 soon fell short of sales expectations, perhaps because its display's 800- x 480-pixel resolution was ho-hum relative to the competition. Or maybe its Windows Phone 7.5 software, despite its merits, simply didn't resonate with smartphone buyers.
Whatever the case, the Lumia 900 didn't make an impact. It now costs only a penny with a 2-year AT&T contract, and the Windows Phone 8-based Lumia 920 has replaced it as Nokia's and Microsoft's alleged iPhone killer.