Nokia’s first Windows Phone-powered smartphone to launch in the United States is already available for free on contract. Nokia and T-Mobile unveiled the Nokia Lumia 710 last month and confirmed that while the handset is certainly not a flagship device, it will play an important role for Nokia as it re-enters the U.S. market. The 710 can’t hold a candle to the Lumia 900 Nokia and AT&T will be launching in March, but at $50, the Lumia 710 is an excellent entry-level smartphone. And at $0 on contract, the price Walmart is currently asking from new customers, the 710 is an unbelievable value. BGR reviewed the Lumia 710 earlier this month and we thought the phone could indeed be a great tool for Nokia and T-Mobile as they tries to convert feature phone users into smartphone customers.