3G - 3rd Generation Wireless Cellular System - includes UMTS, cdma2000 and TD-SCDMA systems

3G - 3rd Generation Wireless Cellular System - includes UMTS, cdma2000 and TD-SCDMA systems.

Wireless Cellular Systems

1G was analog mobile phone systems

2G was the first digital mobile phone systems

3G switched to wideband CDMA, and variable rates channels, 3.5 G adds high speed packet access (HSPA) for better data communications

4G was the first with OFDMA, and an all IP packet-switched core network for data first (voice being just an application); mobile broadband services are the main services

5G extends from just mobile broadband to other application areas like Machine Type Communications and Ultra Reliable Low Latency Communications (URLLC).