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  2. Mobile phone signal - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_signal

    Arbitrary Strength Unit (ASU) is an integer value indicating the received signal strength measured by the mobile phone. It is possible to calculate the real signal strength measured in dBm (and thereby power in Watts) by a formula. However, there are different formulas for 2G, 3G and 4G networks.

  3. List of mobile network operators in the United States

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

    Four of the top five carriers have enabled VoLTE and VoNR on their networks, while Boost uses strictly VoNR. AT&T, T-Mobile, Verizon, Boost Mobile, and U.S. Cellular also sell SIM cards through their retail channels, both in-store and online.

  4. Comparison of mobile phone standards - Wikipedia

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

    In reality, only one person is actually using the channel at a specific moment. This is analogous to time-sharing on a large computer server. Frequency-division multiple access (FDMA) provides multiuser access by separating the used frequencies. This is used in GSM to separate cells, which then use TDMA to separate users within the cell.

  5. The Best Cell Phone Providers: What’s Worth the Cost? - AOL

    www.aol.com/finance/best-cell-phone-providers...

    The number one cell phone carrier would depend on your budget and data requirements. Some carriers to consider would be Mint, Verizon and T-Mobile as they top our list in each area.

  6. How To Pick the Best Cell Phone Carrier - AOL

    www.aol.com/news/2011-10-28-speed-isnt...

    The Big Red carrier. Now that Apple (AAPL) is out with the new iPhone 4S and Google (GOOG) and Samsung are preparing to launch the new Galaxy Nexus smartphone, customers are weighing their carrier ...

  7. Signal strength in telecommunications - Wikipedia

    en.wikipedia.org/wiki/Signal_strength_in...

    For very low-power systems, such as mobile phones, signal strength is usually expressed in dB-microvolts per metre (dBμV/m) or in decibels above a reference level of one milliwatt . In broadcasting terminology, 1 mV/m is 1000 μV/m or 60 dBμ (often written dBu). Examples. 100 dBμ or 100 mV/m: blanketing interference may occur on some receivers

  8. Received signal strength indicator - Wikipedia

    en.wikipedia.org/wiki/Received_signal_strength...

    Cellular signal strength of -74dBm (or 66 asu) displayed on a smartphone.Also shown: signal bars of two cellular networks, and signal bars of a Wi-Fi network. In telecommunications, received signal strength indicator or received signal strength indication [1] (RSSI) is a measurement of the power present in a received radio signal.

  9. Mobile network operator - Wikipedia

    en.wikipedia.org/wiki/Mobile_network_operator

    A mobile network operator (MNO), also known as a mobile network provider, mobile network carrier, mobile telco, wireless service provider, wireless carrier, wireless operator, wireless telco, or cellular company, [a] is a telecommunications provider of services that sells, delivers and maintains mobile telephony services to an end user.

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