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  2. History of prepaid mobile phones - Wikipedia

    en.wikipedia.org/wiki/History_of_prepaid_mobile...

    The history of the prepaid mobile phones began in the 1990s when mobile phone operators sought to expand their market reach. Up until this point, mobile phone services were exclusively offered on a postpaid basis (contract-based), which excluded individuals with poor credit ratings and minors under the age of 18 (the typical age of contractual.)

  3. Prepaid mobile phone - Wikipedia

    en.wikipedia.org/wiki/Prepaid_mobile_phone

    Prepaid mobile phone. A prepaid mobile device, also known as a pay-as-you-go (PAYG), pay-as-you-talk, pay and go, go-phone, prepay, or burner phone, is a mobile device such as a phone for which credit is purchased in advance of service use. The purchased credit is used to pay for telecommunications services at the point the service is accessed ...

  4. List of mobile virtual network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_virtual...

    Voice and data service operators. In general, the types of phones and other devices supported by the MVNOs are in line with the technologies used by the Mobile Network Operator (MNO), the underlying cellular network provider. All major and regional MNOs use 4G LTE / LTE Advanced and 5G NR protocols (2G and 3G having been deprecated and shut ...

  5. Prepaid telephone call - Wikipedia

    en.wikipedia.org/wiki/Prepaid_telephone_call

    Prepaid telephone call. Prepaid telephone calls are a popular way of making telephone calls which allow the caller to control spending without making a commitment with the telephone company . Prepaid phone cards are provided by various telecom companies. When you purchase a prepaid phone card, you are paying for long distance connection time in ...

  6. Prepaid calling cards: Beware misleading call times and ... - AOL

    www.aol.com/news/2010-06-30-prepaid-calling...

    In June 2009, Clifton Telecard Alliance One(CTA) agreed to pay $1.3 million to settle FTC charges that its prepaid cards provided less than half the advertised minutes, charged hidden fees, and ...

  7. STU-III - Wikipedia

    en.wikipedia.org/wiki/STU-III

    STU-III (Secure Telephone Unit - third generation) is a family of secure telephones introduced in 1987 by the NSA for use by the United States government, its contractors, and its allies. STU-III desk units look much like typical office telephones, plug into a standard telephone wall jack and can make calls to any ordinary phone user (with such ...

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