Security

Carriers' insecure procedures make life easy for SIM swap tricksters

So, you have confidence that you are safe from attackers who wreak havoc with authentication weaknesses? Think again or at least consider recent research findings. Five carriers used insecure authentication challenges—insecurity ...

Telecom

Trump signs law to reduce robocalls, though they won't end

An anti-robocalls measure signed into law Monday by President Donald Trump should help reduce the torrent of unwanted calls promising lower interest rates or pretending to be the IRS, though it won't make all such calls disappear.

Telecom

Siting cell towers needs careful planning

No one can overengineer like an engineer. So introducing a little more caution into an existing engineering process is nothing much to ruffle feathers. A new paper published in Environmental Research offers insight on how ...

Telecom

Secure data transmission with ultrasound on the mobile phone

Ultrasound communication is an entirely new method for data exchange between IoT devices and mobile phones. The communication between these is inaudible and the hardware requirements are kept to a minimum: microphone and ...

Internet

Fears grow on digital surveillance: US survey

Americans are increasingly fearful of monitoring of their online and offline activities, both by governments and private companies, a survey showed Friday.

Telecom

Got a weird text? A telecom vendor says it's to blame

If you woke up to a weird text that seemed totally out of place, you aren't alone. A mysterious wave of missives swept America's phones overnight, delivering confusing messages from friends, family and the occasional ex.

Security

Researchers: Cyberespionage campaign targets UN agencies

Cybersecurity researchers say a coordinated cyberespionage campaign has targeted U.N. relief agencies, the International Red Cross and other non-governmental organizations groups for the past 10 months.

Engineering

Mobile phone signals provide occupancy numbers for buildings

Buildings currently consume about 40 percent of all the electricity used in the United States, most of them located in urban areas that are growing rapidly. Because electricity generation is the largest source of greenhouse ...

Energy & Green Tech

Li-ion batteries: Science 'directly into your hand'

They are omnipresent and essential to navigating modern life. Small, light, rechargeable: lithium ion batteries have revolutionised our world in less than three decades.

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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