BuyMobilePhones.net have the sporty and durable Nokia 5140 on 12 months free line rental on a 12 month contract. It's on the o2 network. For £0 (after cashback) you get the 5140, 12 months free line rental (after which you can cancel), 250 x-net mins per month and 50 texts per month.
Designed for supreme durability, the Nokia 5140i optimizes your active-leisure experience by providing useful functionalities applicable to a wide range of sporting activities. The Fitness Coach application enables planning and recording of activities, as well as sharing of training data with training partners. The Sports Themes include sports-related wallpapers, animated screensavers and MP3 ringing tones. Sports-optimized communications are further empowered through other features like Push to talk, Flash messaging and the Nokia Xpress audio messaging function.
This offer works by cashback, which you claim from BuyMobilePhones at specified intervals. If you wish, you can purchase via QuidCo.com for an extra £20 in cashback, so you're making £20 profit on the whole thing!!