Media playback is unsupported on your device

4G rollout: O2's boss Ronan Dunne makes the case

29 August 2013 Last updated at 10:31 BST

O2 and Vodafone are the latest mobile firms to offer 4G on their networks - almost a year after rival Everything Everywhere.

The boss of mobile operator O2 Ronan Dunne talked to BBC News about his firm's 4G rollout.