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  2. Mobile phone - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone

    Mobile phone. A mobile phone or cell phone [a] 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, as opposed to a fixed-location phone ( landline phone ). The radio frequency link establishes a connection to the switching systems of a mobile phone ...

  3. Smartphone - Wikipedia

    en.wikipedia.org/wiki/Smartphone

    Japanese cell phones increasingly diverged from global standards and trends to offer other forms of advanced services and smartphone-like functionality that were specifically tailored to the Japanese market, such as mobile payments and shopping, near-field communication (NFC) allowing mobile wallet functionality to replace smart cards for ...

  4. History of mobile phones - Wikipedia

    en.wikipedia.org/wiki/History_of_mobile_phones

    A satellite phone is a type of mobile phone that connects to other phones or the telephone network by radio link through satellites orbiting the Earth instead of terrestrial cell sites, as cellphones do. Therefore, they can work in most geographic locations on the Earth's surface, as long as open sky and the line-of-sight between the phone and ...

  5. iPhone - Wikipedia

    en.wikipedia.org/wiki/IPhone

    It proved commercially popular, overtaking Motorola RAZR V3 as the best selling cell phone in the US by the end of 2008. Its successor, the iPhone 3GS, was announced on June 8, 2009, at WWDC 2009, and introduced video recording functionality. First iPhone on display under glass at the January 2007 Macworld show

  6. Buying a Mobile Phone in Ho Chi Minh City - Tripadvisor

    www.tripadvisor.com/ShowTopic-g293925-i8433-k...

    5. Re: Buying a Mobile Phone in Ho Chi Minh City. You can buy a pre paid SIM card for 100,000 VND which came with 500MB data, once you reached the limit, the data still work fine, it just throttle the speed. Lincoln, United...

  7. Unlocking a phone for use in Vietnam - Hanoi Forum - Tripadvisor

    www.tripadvisor.com/ShowTopic-g293924-i8595-k...

    3. Re: Unlocking a phone for use in Vietnam. 13 years ago. Every mobile shop in Hanoi can unlock all kinds of phone and it will be charged only 5$-10$ ( for local people, maybe it costs much for foreigners :D). Other way, you come to Vietnam and buy another phone (Nokia 1100,...etc) costing 20 USD and it attaches all sim cards (Viettel ...

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