Via Microsoft – http://www.microsoft.com/en-gb/mobile/campaign-fitbit/

“Get an amazing Lumia 735, 830 or 930 from participating retailers* between 12th January 2015 and 31st March 2015 and we’ll throw in a free Fitbit Flex wristband worth £79.99. Just buy the phone, then install the app below and follow the simple onscreen instructions to claim.

*Vodafone, EE, Virgin, 3, Carphone Warehouse, Tesco, Argos, Shop Direct (Littlewoods, Very), Brighthouse, Sainsbury’s, Asda, Jersey Telecom, Dabs, Ebuyer, Expansys, Clove, Amazon, Mobile Phones Direct, A1 / Go Mobile, Sure (Jersey and Guernsey), Fonehouse, Chitter Chatter, ULM, Meteor Ireland, O2 Ireland, 3 Ireland, Vodafone Ireland, Manx (Isle of Man), Oasis, Microsoft Store”

Just click here to head over to Lumia Phones on Amazon