Evolution and worldwide market penetration

Wireless communication has grown from a few hundred radio-telephone users to billions of mobile subscribers in about 50 years, driven by the cellular concept and cheaper digital technology.

Technology evolution

1. Early radio (1897–1940s) – Marconi's radio transmission; police and military mobile radios.
2. Pre-cellular mobile telephone (1946–1970s) – MTS and IMTS in USA; one high-power transmitter covering a city, very few channels, long waiting lists.
3. Cellular concept (1970s) – Bell Labs: small cells, frequency reuse and handoff, giving large capacity.
4. 1G (1980s) – analog AMPS, NMT, TACS; bulky, expensive phones.
5. 2G (1990s) – digital GSM, IS-95, IS-136; small cheap handsets, SMS; worldwide adoption.
6. 3G (2000s) – UMTS, CDMA2000; mobile internet; smartphones appear.
7. 4G (2010s) – LTE; mobile broadband, apps, video streaming.
8. 5G (2020s) – very high data rates, low latency, IoT.

Alongside these: cordless phones, paging, Wi-Fi (WLAN), Bluetooth (WPAN), satellite phones.

Worldwide market penetration

• Early growth was slow: in the 1980s cellular phones were luxury items; penetration was under 1 % even in rich countries.
• After 2G digital standards (1990s), costs fell and subscribers grew at about 40–50 % per year; mobile subscribers passed fixed lines worldwide around 2002.
• Global mobile subscriptions passed 1 billion in 2002, about 5 billion by 2010 and more than 8 billion subscriptions (over 100 % penetration) in the 2020s.
• Growth after 2010 came mainly from developing countries in Asia and Africa, where mobile leap-frogged fixed lines. In Nepal, mobile penetration is now above 100 % of population (NTA reports), while fixed lines are a few percent.
• Market focus shifted from voice to data: smartphone and mobile broadband subscriptions are now the main growth area.

Subscribers
 (billion)                         ___ 8+
                              ____/
                         ___/
                    ___/
 ______________,--'
 1985    1995    2005    2015    2025

Reasons for rapid penetration: falling handset and tariff prices, prepaid service, digital standards with economies of scale, and mobile data applications.