This may seem weird in Silicon Valley, but even in the US, a lot of people don't have $200 to pay for a phone.
I think badusername's point was that price is a secondary determinant for people. The $200 phones everyone wants but not everyone can afford sell very well once they drop down to $0. However, the $200 phones no one wants sell just as well at $0.
Imagine Apple dropping the price of the iphone below the BOM, that would send their stock reeling.
Er, what? Less convenient to be sure, but not having a cell phone is fine...
That's why these marketing promotions really feel scummy to me. "Buy Mom a smartphone for Christmas" is actually "Show Mom how much you love her with a two year, $2500 financial obligation".