Thanks go to Karen70 who originally posted this when it was 10 months free.
PhoneBoxDirect have the ultra slim Samsung U600 phone with 12 months free on a 12 month contract (after cashback) on Vodafone. For £0 (after cashback), you get the Samsung U600, 12 months free line rental (after which you can cancel), 500 x-net minutes every month and 250 text messages each month too.
The Samsung U600 (Ultra Edition 10.9) exudes elegance and modern style. It's an ultra-slim slider, encased entirely in metal, providing a clean and pure image. The U600 comes equipped with a 3.2 megapixel camera and boasts a large 2.2 inch TFT display. It also has a multimedia player, web browser, email client, assorted messaging enhancements, 60MB internal memory and microSD expandable memory.
This offer works by cashback which you claim from PhoneBoxDirect at specified intervals. If you wish you can purchase via QuidCo.com who will give you £30 in extra cashback, meaning a PROFIT of £30 on the whole thing!! Remember to cancel the insurance if you don't want it as it's quite expensive. As usual, send claims recorded/special delivery as soon as you get the bill and you'll be fine. Please not that PhoneBoxDirect charge £2.50 for the initial credit-check, a charge many phone retailers now employ.