Nokia's new Lumia 900 made a splash this past week at CES, but if you'd like to sample Windows Phone and don't need the high-end hardware, Walmart has a deal for you: it's offering the Nokia Lumia 710 for free with a two-year contract. The entry-level phone is a T-Mobile exclusive here in the US, and normally retails for $49.99 on-contract. While its display and lack of a front-facing camera didn't wow us, it could be a good fit for first-time smartphone buyers — and it's certainly hard to argue with free.