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In 1983, the Dyna TAC 8000x was the first commercially available handheld mobile phone.
The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which provides access to the public switched telephone network (PSTN).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.By 2009, it had become clear that, at some point, 3G networks would be overwhelmed by the growth of bandwidth-intensive applications, such as streaming media.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.
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.
In the developed world, smartphones have now overtaken the usage of earlier mobile systems.
However, in the developing world, they account for around 50% of mobile telephony.
A handheld mobile radio telephone service was envisioned in the early stages of radio engineering.