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The first commercial automated cellular network was launched in Japan by Nippon Telegraph and Telephone in 1979.

This was followed in 1981 by the simultaneous launch of the Nordic Mobile Telephone (NMT) system in Denmark, Finland, Norway, and Sweden.

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Mitchell In 1983, the Dyna TAC 8000x was the first commercially available handheld mobile phone.

From 1983 to 2014, worldwide mobile phone subscriptions grew to over seven billion, penetrating virtually 100% of the global population and reaching even the bottom of the economic pyramid.

Several other countries then followed in the early to mid-1980s.

These first-generation (1G) systems could support far more simultaneous calls but still used analog cellular technology.

The advances in mobile telephony have been traced in successive "generations", starting with the early zeroth-generation (0G) services, such as Bell System's Mobile Telephone Service and its successor, the Improved Mobile Telephone Service.

These 0G systems were not cellular, supported few simultaneous calls, and were very expensive.This sparked competition in the sector as the new operators challenged the incumbent 1G network operators.Ten years later, in 2001, the third generation (3G) was launched in Japan by NTT Do Co Mo on the WCDMA standard.Smartphones have a number of distinguishing features.The International Telecommunication Union measures those with Internet connection, which it calls Active Mobile-Broadband subscriptions (which includes tablets, etc.).This was followed by 3.5G, 3G or turbo 3G enhancements based on the high-speed packet access (HSPA) family, allowing UMTS networks to have higher data transfer speeds and capacity.

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