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  2. What is Apple's SOS mode, and why were our phones stuck ... - AOL

    www.aol.com/apples-sos-mode-why-were-031508882.html

    In short, your iPhone going into SOS mode means your cellular connection is bad. This doesn't apply to your Wi-Fi connection. You'd still be able to use that connection to browse online and ...

  3. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks.

  4. AT&T outage: Company says network is fully restored after ...

    www.aol.com/news/thousands-t-customers-report...

    Scores of AT&T users reported their phones were switched to SOS mode. For Apple iPhones, SOS mode appears when your device isn't connected to a cellular network. But you can still make emergency ...

  5. Network switching subsystem - Wikipedia

    en.wikipedia.org/wiki/Network_switching_subsystem

    The mobile switching center server is a soft-switch variant (therefore it may be referred to as mobile soft switch, MSS) of the mobile switching center, which provides circuit-switched calling mobility management, and GSM services to the mobile phones roaming within the area that it serves. The functionality enables split control between ...

  6. Wi-Fi calling - Wikipedia

    en.wikipedia.org/wiki/Wi-fi_calling

    Wi-Fi calling, also called VoWiFi, [1] refers to mobile phone voice calls and data that are made over IP networks using Wi-Fi, instead of the cell towers provided by cellular networks. [2] Using this feature, compatible handsets are able to route regular cellular calls through a wireless LAN (Wi-Fi) network with broadband Internet , while ...

  7. What is Apple's 'SOS mode'? iPhone feature lets you make ...

    www.aol.com/apples-sos-mode-iphone-feature...

    However, this only allows for automatic calls to a local emergency number. SOS mode also shares your location with the emergency service. ... On all iPhone 14 or later models, you can also use SOS ...

  8. Celia (virtual assistant) - Wikipedia

    en.wikipedia.org/wiki/Celia_(virtual_assistant)

    In China, Chinese Xiaoyi packs with a LLM model called PanGu-Σ 3.0 AI on HarmonyOS 4.0 major upgrade improvements from Celia, making the assistant smarter and more advanced compared to when it was launched in 2020 on EMUI handsets in China and internationally, surpassing Apple and Google by the being the first in the AI industry, with a ...

  9. GSM procedures - Wikipedia

    en.wikipedia.org/wiki/GSM_procedures

    GSM (Global System for Mobile Communications) is a set of standards for cell phone networks established by the European Telecommunications Standards Institute and first used in 1991. Its procedures refers to the steps a GSM network takes to communicate with cell phones and other mobile devices on the network.