The Lumia 900 is a hell of a phone. Plus, it's cheap: just $100 regularly, and temporarily FREE while Nokia works out some software issues. But it's not for lack of quality parts: iSuppli crunched the numbers and determined it costs $217 to build and manufacture. That's more than the iPhone.
For comparison's sake, the iPhone 4S's 16GB model costs an estimated $188 to build and retails for $200. The Lumia's component prices are about the same, but strangely, it shoots ahead with an expensive screen compared to the iPhone. The Lumia's screen is larger physically, but has a much lower pixel density than the iPhone's retina display.
Nokia—and its partner in crime Microsoft—desperately wants to get a foothold with the Lumia line of Windows Phones. That's why the Lumia 710 was just $50 on T-Mobile, and why the regular price for the 900 is just $100. Nokia's willing to subsidize hardware to gain market share. If this works, it'll be absolutely worth it. If not, well, that's a mighty big bill Nokia just stuck itself with. [iSuppli]