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  2. Mobile phone signal - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_signal

    A mobile phone signal (also known as reception and service) is the signal strength (measured in dBm) received by a mobile phone from a cellular network (on the downlink). Depending on various factors, such as proximity to a tower , any obstructions such as buildings or trees, etc. this signal strength will vary.

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

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

    Operates on Verizon's native 4G/LTE network and WiFi calling (no 3G – Verizon will shut this down at the end of 2020 anyway or roaming- some reports of LTEiRA roaming with talk and text). No toll-free customer service #; service provided via in-app chat, text, Facebook, or Twitter; callbacks by request.

  4. Preferred Roaming List - Wikipedia

    en.wikipedia.org/wiki/Preferred_Roaming_List

    The information contained in each acquisition table entry includes an index, the network type, and associated channel blocks. System Table – A prioritized list of systems that the device is permitted to access (Preferred Systems) and those that it is explicitly forbidden to access (Negative Systems). Note that it is also possible to indicate ...

  5. iPhone 3G - Wikipedia

    en.wikipedia.org/wiki/IPhone_3G

    Following the release of the successor iPhone 3GS model one year later, the iPhone 3G remained on sale but became Apple's budget phone offer, with its price reduced. This $99 iPhone 3G required a two-year contract and was available only in black and with 8 GB of storage, but came bundled with the then-new iPhone OS 3.0 firmware. [ 15 ]

  6. Access Point Name - Wikipedia

    en.wikipedia.org/wiki/Access_Point_Name

    An 'Access Point Name' (APN) is the name of a gateway [2] between a mobile network (GSM, GPRS, 3G, 4G and 5G) and another computer network, frequently the public Internet. [3] Some Important APN Terms: Below are some terms of the APN settings, explaining what each setting stands for: APN: The APN address of your (mobile network operator) MNOs.

  7. Cell Broadcast - Wikipedia

    en.wikipedia.org/wiki/Cell_Broadcast

    Cell Broadcast messaging was first demonstrated in Paris in 1997. Some mobile operators used Cell Broadcast for communicating the area code of the antenna cell to the mobile user (via channel 050), [5] for nationwide or citywide alerting, weather reports, mass messaging, location-based news, etc. Cell broadcast has been widely deployed since 2008 by major Asian, US, Canadian, South American ...

  8. List of wireless network technologies - Wikipedia

    en.wikipedia.org/wiki/List_of_wireless_network...

    CDMA2000 is a family of 3G mobile technology standards for sending voice, data, and signaling data between mobile phones and cell sites. It is a backwards-compatible successor to second-generation cdmaOne (IS-95) set of standards and used especially in North America and South Korea, China, Japan, Australia and New Zealand.

  9. IP Multimedia Subsystem - Wikipedia

    en.wikipedia.org/wiki/IP_Multimedia_Subsystem

    The IP multimedia core network subsystem is a collection of different functions, linked by standardized interfaces, which grouped form one IMS administrative network. [7] A function is not a node (hardware box): An implementer is free to combine two functions in one node, or to split a single function into two or more nodes.