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  2. List of CDMA2000 networks - Wikipedia

    en.wikipedia.org/wiki/List_of_CDMA2000_networks

    Initially constructed by China Unicom, sold to China Telecom in 2008. 2100 MHz spectrum refarmed to LTE in Jul 2016. Gradual network shut down since Jun 2020. Network to shut down in 2025. MPT. Myanmar. CDMA2000 1xRTT. 450 / 800.

  3. List of mobile network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_network...

    AT&T, T-Mobile, Verizon, Boost Mobile, and U.S. Cellular also sell SIM cards through their retail channels, both in-store and online. The top five wireless providers operate nationwide wireless networks which cover most of the population in the United States, while smaller carriers provide native network coverage across selected regions of the ...

  4. CDMA2000 - Wikipedia

    en.wikipedia.org/wiki/CDMA2000

    CDMA2000. CDMA2000 (also known as C2K or IMT Multi‑Carrier (IMT‑MC)) is a family of 3G [1] mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. It is developed by 3GPP2 as a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in ...

  5. Code-division multiple access - Wikipedia

    en.wikipedia.org/wiki/Code-division_multiple_access

    Multiplexing. Code-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel. This allows several users to share a band of frequencies (see bandwidth).

  6. Comparison of mobile phone standards - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_mobile_phone...

    GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA. WiMAX and LTE use OFDM. Time-division multiple access (TDMA) provides multiuser access by chopping up the channel into sequential time slices. Each user of the channel takes turns to transmit and receive signals.

  7. Metro by T-Mobile - Wikipedia

    en.wikipedia.org/wiki/Metro_by_T-Mobile

    Metro by T-Mobile, formerly known as MetroPCS, and simply known as Metro, is an American prepaid wireless service provider and brand owned by T-Mobile US. It previously operated the fifth largest mobile telecommunications network in the United States using code-division multiple access (CDMA). In 2013, the carrier engaged in a reverse merger ...

  8. Time-division multiple access - Wikipedia

    en.wikipedia.org/wiki/Time-division_multiple_access

    Time-division multiple access (TDMA) is a channel access method for shared-medium networks. It allows several users to share the same frequency channel by dividing the signal into different time slots. [1] The users transmit in rapid succession, one after the other, each using its own time slot. This allows multiple stations to share the same ...

  9. CDMA frequency bands - Wikipedia

    en.wikipedia.org/wiki/CDMA_frequency_bands

    CDMA frequency bands. CDMA frequency bands or frequency ranges are the cellular frequencies designated by the ITU for the operation of cdmaOne and CDMA2000 mobile phones and other mobile devices. [1][2][3][4]

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