Electronics & Semiconductors

An acoustically actuated microscopic device

Researchers at EPFL have developed remote-controlled, mechanical microdevices that, when inserted into human tissue, can manipulate the fluid that surrounds them, collect cells or release drugs. This breakthrough offers numerous ...

Business

YouTube tests TikTok rival in India

YouTube on Monday began testing a TikTok rival in India, saying it would refine its short video format and roll it out in more countries in coming months.

Business

SoftBank Group selling Arm to NVIDIA for up to $40 billion

Japan's SoftBank Group said Monday it is selling British chip designer Arm to US firm NVIDIA for up to $40 billion, potentially creating a new giant in the industry but sparking an investigation by UK regulators and fears ...

Business

Insider Q&A: T-Mobile pushes internet for virtual school

T-Mobile is pushing to offer internet service to schools that are doing online learning with a program aimed at low-income students who don't have access. In the U.S., millions of students don't have high-speed internet or ...

Business

Samsung wins $6.6 billion Verizon 5G order

Samsung Electronics clinched a $6.6 billion agreement to provide 5G network equipment to Verizon in the United States, a regulatory filing showed Monday, expanding its presence in the strategically crucial market.

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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