I am about to go abroad so have reset my counters to see what I am using. But I noticed that my Network data Usage immediately registered some, albeit small, usage straight away. I then made sure all Apps were shut down and fired up iPod on the iPhone. I notice the small rotating circular icon on the screen (to left next to cellular signal strength) and the go and check the Network Data usage again. Sure enough it has increased. I'm in UK. 3G & Cellular data are on. Wifi and bluetooth are off. I'm not moving - and I'm about 100ft away from an inbuilding microcell. So why is iPod talking to the network and what is it talking about?