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A handheld mobile radio telephone service was envisioned in the early stages of radio engineering.In 1917, Finnish inventor Eric Tigerstedt filed a patent for a "pocket-size folding telephone with a very thin carbon microphone".
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.The first handheld mobile cell phone was demonstrated by Motorola in 1973.The first commercial automated cellular network was launched in Japan by Nippon Telegraph and Telephone in 1979.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.Consequently, the industry began looking to data-optimized fourth-generation technologies, with the promise of speed improvements up to ten-fold over existing 3G technologies.The first two commercially available technologies billed as 4G were the Wi MAX standard, offered in North America by Sprint, and the LTE standard, first offered in Scandinavia by Telia Sonera.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 100% of the global population and reaching even the bottom of the economic pyramid.These first-generation (1G) systems could support far more simultaneous calls, but still used analog technology.