'Flight' Mode on my mobile.
I have a Nokia 6233 mobile. It has a 'Flight' mode so you can use the camera, mp3 functions etc without any signals. I noticed though that with that mode selected, although the signal bars disappear, the 3G icon is still on. I don't really understand what 3G is, (I know it is for multi-media stuff like downloading songs) but why is it not a problem when the normal network is?