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That corn was highly important in the Maya culture is something that Genner Llanes Ortiz, himself a Maya from the Mexican province of Yucatan, has always known, right from his childhood. But just how important the role of ...

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Computers, mobile phones and all other electronic devices contain thousands of transistors linked together by thin films of metal. Scientists at Linköping University, Sweden, have developed a method that can use the electrons ...

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Earth is a pale, blue dot when seen from space. Its blue color is due to our home planet being 71% covered in water. NASA monitors Earth's water from space, the skies, ground stations on land, ships sailing the seas and even ...

Mobile phones are a workplace problem in retail

How do frontline employees in retail react to and handle situations where the customer ignores them and instead looks at their mobile phone? This has been studied by researchers Markus Fellesson, Associate Professor at CTF, ...

Refurbished smart phones—the millennial or Gen X choice

Millions living on the Indian sub-continent aspire to ownership of the technological breakthroughs, smartphones, tablet computers, etc that are now almost ubiquitous in other countries. The question of sustainability arises ...

The greenbacks in mobile phone mines

No-one who is economically active can afford to go without at least a mobile phone, and at the pace that electronic equipment is re-invented, it's only a matter of time before your 'latest' iPhone 11 ends up on a dump site.

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Mobile phone

A mobile phone or mobile (also called cellphone and handphone, as well as cell phone, wireless phone, cellular phone, cell, cellular telephone, mobile telephone or cell telephone) is a long-range, electronic device used for mobile voice or data communication over a network of specialized base stations known as cell sites. In addition to the standard voice function of a mobile phone, telephone, current mobile phones may support many additional services, and accessories, such as SMS for text messaging, email, packet switching for access to the Internet, gaming, Bluetooth, infrared, camera with video recorder and MMS for sending and receiving photos and video, MP3 player, radio and GPS. Most current mobile phones connect to a cellular network consisting of switching points and base stations (cell sites) owned by a mobile network operator (the exception is satellite phones, which are mobile but not cellular).

As opposed to a radio telephone, a mobile phone offers full duplex communication, automatised calling to and paging from a public switched telephone network (PSTN), handoff (am. English) or handover (European term) during a phone call when the user moves from one cell (base station coverage area) to another. A mobile phone offers wide area service, and should not be confused with a cordless telephone, which also is a wireless phone, but only offer telephony service within a limited range, e.g. within a home or an office, through a fixed line and a base station owned by the subscriber.

The International Telecommunication Union estimated that mobile cellular subscriptions worldwide would reach approximately 4.1 billion by the end of 2008. Mobile phones have gained increased importance in the sector of Information and communication technologies for development in the 2000s and have effectively started to reach the bottom of the economic pyramid.

This text uses material from Wikipedia, licensed under CC BY-SA