Smartphone smackdown: the best (and worst) of 2013 video review

It's the end of 2013 and there have been a lot of smartphones released this year, from the likes of Blackberry, Sony, Motorola, HTC, Apple and Google. But which ones are the dogs and which ones are the winners? Charles Arthur and Samuel Gibbs try and test the best and the worst. They also cast their expert eyes on the trends to expect in 2014