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Early predecessors of cellular phones included analog radio communications from ships and trains.
The race to create truly portable telephone devices began after World War II, with developments taking place in many countries.
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.
A mobile phone, known as a cell phone in North America, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
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).
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.
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.Pour les MMS avec Windows mobile 6.1: messagerie menu options MMS profil nouveau profil Profil MMS: mmsfree Centre MMS: Cnx donn: free Passerelle: WAP 2.0 Adresse IP: 2.225 Port: 80 Rebootez le téléphone.Attention, les MMS ne fonctionne que en 3G & 3G , pas en 2G, ni EDGE.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.