from wiki about 4g. the ITU-R organization specified the IMT-Advanced (International Mobile Telecommunications Advanced) requirements for 4G standards, setting peak speed requirements for 4G service at 100 Mbit/s for high mobility communication (such as from trains and cars) and 1 Gbit/s for low mobility communication (such as pedestrians and stationary users).
Pre-4G technologies such as mobile WiMAX and first-release Long term evolution (LTE) have been on the market since 2006