Generation | Definition | Throughput | Technology | Time period | Features |
| 1G | Analog | 14.4 Kbps (peak) | AMPS,NMT,TACS | 1970 – 1980 | Wireless phones are used for voice only. |
| 2G | Digital Narrow band circuit data | 9.6/14.4 Kbps | TDMA,CDMA | 1990 to 2000 | This is achieved by allowing multiple users on a single channel via multiplexing. Cellular phones are used for data also along with voice. |
| 2.5G | Packet Data | 171.2 Kbps(peak) 20-40 Kbps | GPRS | 2001-2004 | The Internet becomes popular and data becomes more relevant. Multimedia services and streaming starts to show growth. Phones start supporting web browsing though limited and very few phones have that. |
| 3G | Digital Broadband Packet Data | 3.1 Mbps (peak) 500-700 Kbps | CDMA 2000 (1xRTT, EVDO) UMTS, EDGE | 2004-2005 | Multimedia services support along with streaming are more popular. Universal access and portability across different device types are made possible. (Telephones, PDA’s, etc.) |
| 3.5G | Packet Data | 14.4 Mbps (peak) 1-3 Mbps | HSPA | 2006 – 2010 | Higher throughput to support higher data needs of the consumers |
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