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Demand for metals used in mobile phones and other electronics fuelled the Second Congo War , which claimed almost 5. The profits from the minerals finance the bloodiest conflict since the second world war; the war has lasted nearly 20 years and has recently flared up again.
For the last 15 years, the Democratic Republic of the Congo has been a major source of natural resources for the mobile phone industry.
From Wikipedia, the free encyclopedia. For the film, see Cell Phone film. For the film, see Handphone film.
For the mobile personal computer, see Smartphone. History of mobile phones. Cellular network and WiFi. This section needs expansion.
You can help by adding to it. List of digital distribution platforms for mobile devices. This section needs to be updated. Please update this article to reflect recent events or newly available information.
Statistics until mid is needed for some parts of this section. List of best-selling mobile phones and List of mobile phone makers by country.
Mobile banking and Mobile payment. Branchless banking and Contactless payment. Cellphone surveillance and Mobile phone tracking. Mobile phones and driving safety and Texting while driving.
Mobile phone radiation and health. Nomophobia and Mobile phone overuse. Mobile phone use in schools. Telecommunication portal Internet portal.
Celebrating 30 Years of Mobile Phones". Retrieved 7 September The developing world is home to about million female Internet users and million male Internet users.
The developed world is home to about million female Internet users and million male Internet users. Retrieved 21 May Archived from the original on 22 October Retrieved 29 July Purdue School of Engineering.
Retrieved 23 April Retrieved 1 January Retrieved 3 April Performance Characteristics and the Effects on the User Interface".
Retrieved 8 June We Asked An Expert". Retrieved February 24, Retrieved 20 March The rise and fall of a mobile pioneer". Retrieved 11 July Retrieved 3 August Retrieved 4 November Archived from the original on 25 September Archived from the original on 22 May Retrieved 3 December Archived from the original on 14 May Retrieved 4 June Journal of Modern African Studies.
Archived from the original on 21 September Archived from the original on 26 March Retrieved 29 January Archived from the original on 24 January Retrieved 21 January Retrieved 14 March Retrieved 4 February Archived from the original on 10 November Behaviour May Shape Attitude".
Accident Analysis and Prevention. Incidence and effects on behaviour and safety , Ergonomics , Vol 53, No. Social Science Computer Review.
Retrieved 12 May Archived from the original on 19 January Retrieved 15 July Public Health Law Research. Retrieved 27 June Retrieved 31 July Retrieved 19 January Cell phone use can increase possible cancer risk".
Retrieved 31 May A review including the long term epidemiologic data". Cell Phones May Cause Cancer". Retrieved 10 May Retrieved 29 September Compatible Brand Apple iPhones Samsung.
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Insert the transceiver or battery into the drop-in charging tray. Now remove the battery or the transceiver from the drop-in charging tray.
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Because the network knows that the phone is connected to that particular cell, it can also route calls to the mobile phone.
Sometimes the radio connection to the cell is lost, for example when you go underground. This means the phone cannot make or receive calls until the connection is made again.
The network is the company that provides the phone service. In most areas there will be more than one mobile network. Customers choose networks based on how well the different networks work in their area, or by price.
Mobile phones use different technical standards. The SIM has information like the phone number and payment account and this is needed to make or receive calls.
The SIM may be supplied by the same company as the phone, or a different one. Sometimes you can change the network by using a SIM from another network, but some companies do not want this to happen and they lock the phone so that you have to use their SIM.
The others have a special radio inside them that only makes phone calls when the phone is activated. When someone buys a contract, the network gives them a code, that if they enter it into the phone, the phone will then make calls.
A majority of new mobile phones from the 21st century are smartphones. These phones are basically small computers. Besides calling, they can be used for email , browsing the internet , playing music and games , and many other functions that computers can perform.
Most smartphones run a common mobile operating system. This allows developers to make mobile apps that work on many different phones without needing to change the code.
Cases, which are designed to attach to, support, or otherwise hold a smartphone, are popular accessories. Some have a keyboard built in.
Case measures are based on the display inches e. There are different types:. More people are using smartphones than the old kind of mobile phone, which are called feature phones covers .
Heavy duty cases are designed to protect from drops and scratches. From Wikipedia, the free encyclopedia. Retrieved 6 February Retrieved from " https: Commons category link is on Wikidata.
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This is called a "hand off," and the call continues with the new cell the phone is connected to. The hand-off is done so well and carefully that the user will usually never even know that the call was transferred to another cell.
As mobile phones became more popular, they began to cost less money, and more people could afford them. Cell phones have become so cheap to own that they have mostly replaced pay phones and phone booths except for urban areas with many people.
In the 21st century , a new type of mobile phone, called smartphones , have become popular. Now, more people are using smartphones than the old kind of mobile phone, which are called feature phones.
Mobile phones in the s through s were large and heavy, and most were built into cars. In the late 20th century technology improved so people could carry their phones easily.
Martin Cooper from Motorola made the first call using a mobile phone in , it did not use the type of cellular mobile phone network that we use today.
The first mobile phone networks were created in the late s in Japan. Now almost all urban areas, and many country areas, are covered by mobile phone networks.
A cell phone combines technologies, mainly telephone, radio , and computer. Most also have a digital camera inside. Cell phones work as two-way radios.
They send electromagnetic microwaves from base station to base station. The waves are sent through antennas. This is called wireless communication.
Early cell telephones used analog networks. They became rare late in the 20th century. Modern phones use digital networks. The first digital networks are also known as second generation, or 2G, technologies.
The difference is in communication protocol. Other countries like Japan have different 2G protocols. A few 2G networks are still used.
The radio waves that the mobile phone networks use are split into different frequencies. The frequency is measured in Hz. Low frequencies can send the signal farther.
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Hot selling approved ce fcc LTUV handy walkie talkie dual band ham radio mobile. Electronic Volume Selection 8. Automatic Battery Saving Earphone and Charger jack available About product and suppliers:As a phone casino spiele kostenlos spielen ohne anmeldung merkur around, a phone will "hand off"- automatically disconnect and reconnect to the tower that gives the best reception. Archived from the original on lottohelden paypal geht nicht September Mobile phones are used for a variety of purposes, such as keeping in touch with family members, for conducting business, and in order to have access to a telephone in the event of an emergency. Multiple SIM cards may be used to take advantage of the benefits of different calling plans. Both the SIM card and the handset can be tracked. Retrieved 4 February Soon afterwards, other media content appeared, such as news, video games, jokes, horoscopes, TV content and advertising. In the developed world, smartphones have now overtaken the usage of earlier mobile systems. In other projects Wikimedia Commons Wikivoyage. The majority of this research queen of no definite causative relationship between exposure to mobile phones and harmful biological effects in humans. Everything comes with expert installation by Ladbrokes aktionscode. Screen sizes are measured in diagonal inches ; feature phones generally luton casino screen sizes below 3.