Data speeds are measured in megabits per second (mbps). Wifi is about 15 mbps. 3g is about 3-3.5 mbps. 4g is about 12-20 mbps. In short words: 4g is much faster than 3gCan someone explain what the difference between the 3G and 4G is. I already have trouble understand what 3G means and now were in to 4G. Help!