Microsoft has a sweet deal that comprises a Fitbit Flex and a certain Windows Phone device
You can choose between T-Mobile's white and AT&T's black version of the Nokia Lumia 635, both off-contract. Apart from the duo of color and carrier options, customers can have their Fitbit Flex in two different colors, either black or teal. There's a catch, however – the bundle with the T-Mobile version is priced at $178.95, whereas the AT&T one is some $30 cheaper.
You get to save a little money (up to $50 with the AT&T deal, that is), so if you are on the market for both a mid-range smartphone, such as the Lumia 635, and a fitness tracker, just like the Fitbit Flex, then definitely check out Microsoft's deal.
source: Microsoft via WPCentral