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  2. 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 ...

  3. Preferred Roaming List - Wikipedia

    en.wikipedia.org/wiki/Preferred_Roaming_List

    This allows the phone to choose the best roaming carriers, particularly "roaming partners" with whom the home carrier has a cost-saving roaming agreement, rather than using non-affiliated carriers. PRL files can also be used to identify home networks along with roaming partners, thus making the PRL an actual list that determines the total ...

  4. 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 ...

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

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

    There are also MVNOs who provide only data service to mobile hotspot devices (mobile broadband providers). Native Wi-Fi calling refers to the ability of mobile phones on the service to seamlessly use Wi-Fi rather than the cellular network to connect normally dialed calls, when enabled. It does not refer to the ability to use third-party ...

  6. PRIVATE WiFi Mobile FAQs - AOL Help

    help.aol.com/articles/private-wifi-mobile-faqs

    It’s no secret that public WiFi hotspots aren’t secure. With PRIVATE WiFi Mobile by AOL, you can encrypt everything you send and receive over public WiFi with bank-level security. Feel confident surfing, sharing, shopping, and banking from your mobile device knowing you are better protected. Activate your PRIVATE WiFi Mobile by AOL benefit ...

  7. 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.

  8. Unstructured Supplementary Service Data - Wikipedia

    en.wikipedia.org/wiki/Unstructured_Supplementary...

    The user submits a code corresponding to the service available. USSD can be used to provide independent calling services such as a callback service (to reduce phone charges while roaming), enhance mobile marketing capabilities or interactive data services. USSD is commonly used by prepaid GSM cellular phones to query the available balance.

  9. List of mobile network operators in the United States

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

    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 United States while supplementing nationwide coverage through roaming agreements with other carriers.