1G mobile system
The 1G mobile system is introduced in the early 1980s. The 1G mobile system was based on analog cellular Technology. This network was mainly designed for voice calls no consideration of Data Services. The major drawback of the 1G system were its low capacity, poor voice links and no security.
2G mobile system
The 2G network was the first digital cellular system introduced in 1990. The 2G system was based on GSM Technology. 2G was offering improved sound quality, better security, SMS, Voicemail and fax services.
2.5G mobile system
It is the enhanced version of 2G. It offers services like MMS, sending pictures through email.
3G mobile system
3G Technology adds multimedia facilities to the 2G phone by allowing video, audio and graphics applications. With the invention of 3G watching online videos and video conferencing become a reality. It has the capacity of higher data rates and it opens the door to many internet style applications. The 3G mobile system is also known as the universal mobile telecommunication system (UMTS).
4G mobile system
4G is an enhanced version of 3G it is based on packet switching. It is able to support faster transmission. It provides data rate up to 100 MBPS. It is wireless access technology.
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