The Nokia Lumia 720 is being offered for free at Sun Cellulars Plan 999 on a 24-month contract. This 4.3-inch Windows Phone 8 device is being offered with unlimited data, unlimited Sun-to-Sun text and four hours of Sun-to-Sun calls.
Sun Cellular is also offering the Nokia Lumia 520, free at Plan 600 on a 24-month contract. The Lumia 520 is Nokia entry level Windows Phone 8 device. Sporting a sharp WVGA 4-inch display, it really does not feel or look like a low cost device.
Plan 600 comes with unlimited calls and text within the Sun Network, 350 SMS to other networks and Php250 consumable.
You can read more about the Nokia Lumia 720 and 520 at this link.