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  2. Preferred Roaming List - Wikipedia

    en.wikipedia.org/wiki/Preferred_Roaming_List

    The Preferred Roaming List (PRL) is a database residing in a wireless (primarily CDMA) device, such as a cellphone, that contains information used during the system selection and acquisition process. In the case of R-UIM -based CDMA devices, the PRL resides on the R-UIM .

  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. How to avoid costly iPhone data roaming charges - AOL

    www.aol.com/news/2009-10-14-how-to-avoid-costly...

    Recently the Los Angeles Times showcased a problem that more and more iPhone users are running into when they travel; expensive data roaming charges. The article profiles the plight of Nathan ...

  5. List of mobile network operators in the United States

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

    Acquired by Verizon Wireless: Choice Wireless former Amerilink Wireless: GSM: EDGE: Unknown: 2016: Became a T-Mobile US MVNO. Cincinnati Bell Wireless: GSM, UMTS, GAN Wi-Fi calling [48] EDGE, HSPA+: 0.34 [49] (January 2014) February 2015: Spectrum assets acquired by Verizon Wireless, service to any customers remaining on the network was shut ...

  6. Traveling abroad? Your wireless network's roaming plan isn't ...

    www.aol.com/lifestyle/traveling-abroad-wireless...

    For premium support please call: 800-290-4726 more ways to reach us

  7. 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 ...

  8. Mobile data offloading - Wikipedia

    en.wikipedia.org/wiki/Mobile_data_offloading

    Wi-Fi is considered to be a non-3GPP WLAN radio access network (RAN). [18] 3GPP has also specified an alternative loosely coupled solution for Wi-Fi. The approach is called Interworking Wireless LAN (IWLAN) [19] architecture and it is a solution to transfer IP data between a mobile device and operator's core network through a Wi-Fi access. In ...

  9. Roaming - Wikipedia

    en.wikipedia.org/wiki/Roaming

    The HLR will send to the VLR a MAP PRN (Provide Roaming Number) message to obtain the MSRN of the roaming cell phone. Like that the HLR will be able to route the call to the correct MSC. With the IMSI contained in the MAP PRN message, the VLR assigns a temporary number known as the mobile station roaming number (MSRN) to the roaming cell phone.