3G” stands for Third Generation, “4G” stands for Fourth Generation and “4G LTE” stands for Fourth Generation, Long Term Evolution.
4G LTE is the most advanced in terms of speed. The general claim is that 4G LTE networks can download data at speeds between 5 and 12 megabits per second — enough for smooth streaming for live video and better response times for online multiplayer games. (Data-transfer speeds from the network to mobile devices like smartphones and tablets vary due to factors like the carrier and coverage area.)
In comparison, the realistic download speeds for 4G networks can range anywhere from 3 to 8 megabits per second, depending on congestion, the wireless carrier and the specific technology the company has used for its data network. The older 3G networks can typically download data around 800 to 950 kilobits per section
