1G refers to the first generation of wireless telephone technology, mobile telecommunications which was first introduced in 1980s and completed in early 1990s.
It’s Speed was upto 2.4kbps, allowed the voice calls in 1 country.
It used Analog Signal and AMPS was first launched in USA in 1G mobile systems
2G technology refers to the 2nd generation which is based on GSM.
It’s data speed was upto 64kbps.
It enables services such as text messages, picture messages and MMS (multi media message).
It provides better quality and capacity.
3G technology refer to third generation which was introduced in year 2000s.
Data Transmission speed increased from 144kbps- 2Mbps.
Typically called Smart Phones and features increased its bandwidth and data transfer rates to accommodate web-based applications and audio and video files.
Its features are Providing Faster CommunicationSend/Receive Large Email MessagesHigh Speed Web / More SecurityVideo Conferencing.
4G technology refer to or short name of fourth Generation which was started from late 2000s.
Capable of providing 100Mbps – 1Gbps speed.
One of the basic term used to describe 4G is MAGIC.
Its feature are More SecurityHigh SpeedHigh CapacityLow Cost Per-bit.