At T-Mobile, get a select new or refurbished 4G smartphone for $0 via a mail-in rebate when you sign up for a 2-year agreement with a qualifying Classic plan online. With free shipping, that's tied with our mention from last winter (which also included select tablets) and the best discount we've seen on such a selection of smartphones from T-mobile this year. Sales tax is added where applicable. Notable units include the Samsung Galaxy S III, HTC Radar 4G, T-Mobile myTouch, Nokia Lumia 710, and more. Deal ends November 17.

A best bet is the Samsung Galaxy S III 4G Android Smartphone for T-Mobile in Pebble Blue (pictured) or White for $199.99. Sign up for a new 2-year agreement with a qualifying Classic plan and a $200 mail-in rebate cuts it to $0. With free shipping, that's the first time we've seen this phone for free on any network and $200 under the lowest total price we could find elsewhere. This GSM 4G phone features a 4.8" 720x1280 Super AMOLED touchscreen, Snapdragon 1.5GHz dual-core processor, 2GB RAM, 16GB memory, 8-megapixel rear camera, 2-megapixel front camera, 1080p video capture, GPS, Bluetooth 4.0, 802.11n wireless, Samsung Galaxy S III Accessory Bundle, Google Android 4.0 OS (Ice Cream Sandwich), and more.

A $35 activation fee still applies. Refurbished items are covered by a 90-day T-Mobile warranty.