Shoutbox

3G doesn't work over GSM. It will work on a different protocol, for example UTMS or W-CDMA. However, most 3G phones also have GSM radios, and can work on GSM as well.

The faster internet is because the 3G protocols have been designed for it. To get internet over GSM, it would be through GPRS (not as fast) or over CSD (slow).

You can't use the 3G to use VOIP from your phone. Somebody may have made a VOIP application program for K800, using Bluetooth or perhaps even 3G fast internet.

There's no real use than the faster downloads, video calling, and having a phone that has 3G printed on it, is bulkier, and runs shorter amounts of time between charges.