|3D requires a special screen or combination of screen and glasses. The idea of 3d is to send a slightly different image to each eye so that it gives the impression of depth. Some systems work well, other can just result in a headache! As well as the special screen you also need an image/animation/film that has been created in 3d - essentially using two cameras at slightly different angles to give the effect when it's converted back to a screen image for your eyes.|
For more in-depth explanations, try googling '3d image', '3d animation' or '3d films'.
3g is nothing to do with 3d, it is a transmission technology used for mobile phones - it stands for '3rd generation'.
"I've always been mad, I know I've been mad, like the most of us..." Pink Floyd