The world's biggest cell phone company, Vodafone Group Plc, will launch a new music service to provide - in partnership with Sony NetServices - access to music via cell phones, writes Reuters. The Vodafone Radio DJ service will offer personalized radio channels streamed to customers' 3G mobile phones and computers. Vodafone plans to launch the service in six European countries in the coming months and eventually to over 20 countries around the world.