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Two decades of evolution of mobile phones, from a 1992 Motorola DynaTAC 8000X to the 2014 iPhone 6 Plus. A mobile phone, or cell phone, [a] is a portable telephone that allows users to make and receive calls over a radio frequency link while moving within a designated telephone service area, unlike fixed-location phones (landline phones).
The history of mobile phones covers mobile communication devices that connect wirelessly to the public switched telephone network. While the transmission of speech by signal has a long history, the first devices that were wireless, mobile, and also capable of connecting to the standard telephone network are much more recent.
In many countries, mobile phones are used to provide mobile banking services, which may include the ability to transfer cash payments by secure SMS text message. Kenya's M-PESA mobile banking service, for example, allows customers of the mobile phone operator Safaricom to hold cash balances which are recorded on their SIM cards. Cash can be ...
0G: An early cellular mobile phone technology emerged in the 1970s. At this time, although briefcase-type mobile phones have appeared, they still generally need to be installed in a car or truck. PTT: Push to talk; MTS: Mobile Telephone System; IMTS: Improved Mobile Telephone Service; AMTS: Advanced Mobile Telephone System
That first cell phone began a fundamental technology and communications market shift to making phone calls to a person instead of to a place. [6] [19] Bell Labs had introduced the idea of cellular communications in 1947, but their first systems were limited to car phones which required roughly 30 pounds (12 kg) of equipment in the trunk. [21]
Previous telephones required the user to operate a separate switch to connect either the voice or the bell. With the new kind, the user was less likely to leave the phone "off the hook". In phones connected to magneto exchanges, the bell, induction coil, battery, and magneto were in a separate bell box called a "ringer box". In phones connected ...
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The wireless revolution began in the 1990s, [57] [58] [59] with the advent of digital wireless networks leading to a social revolution, and a paradigm shift from wired to wireless technology, [60] including the proliferation of commercial wireless technologies such as cell phones, mobile telephony, pagers, wireless computer networks, [57 ...