1G

First Generation

The first generation of wireless cellular technology. It was introduced in the 1980s and was fully analog. The data transmission was based on analog signals, and this generation of technology could only support voice calls.

These systems were characterized by a lack of encryption and thus poor security, low capacity, unreliable handoff (which led to dropped calls), poor voice links, and no international roaming. Advanced Mobile Phone System (AMPS) in the United States and Nordic Mobile Telephony (NMT) in Scandinavia were two examples of 1G wireless technology.

The switch to 2G technology occurred in the early 1990s and marked the transition from analog to digital communications, which included advancements like encrypted conversations and SMS messaging. As of now, we’ve progressed to 5G technology, with each new generation introducing significant advancements over the previous one.

• Abbreviation: 1G