Shoutbox

Also, all 3G and 4G mean are 'third-generation' and 'fourth-generation'. It's not so much a particular technology, just a level of advancement and sophistication.
For instance, take the XBox 360 and the PS3. They use very different technologies (PowerPC vs Cell), but they are both of the same generation of consoles.
However, the 'generation' isn't the important thing: it's whether the device meets your needs.