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  2. List of UMTS networks - Wikipedia

    en.wikipedia.org/wiki/List_of_UMTS_networks

    For technical details on UMTS and a list of its designated operating frequencies, bands, and their common names, see UMTS frequency bands. Networks on the global UMTS-bands 1 and 8 are suitable for global roaming in ITU Regions 1, 2 (some countries) and 3. Networks on UMTS-bands 2 and 4 allow roaming in ITU Region 2 (Americas) only.

  3. List of mobile network operators - Wikipedia

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

    List of mobile network operators in the Middle East and Africa; List of mobile network operators of the Americas; Country lists List of sovereign states by number of broadband Internet subscriptions; List of countries by number of Internet users; List of countries by number of telephone lines in use; List of countries by smartphone penetration

  4. List of mobile network operators in the United States

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

    Subscriber counts are sourced from each companies quarterly reports. Subscriber counts include what each companies quarterly report states, whether it be just postpaid and prepaid (as in the case of Boost Mobile and UScellular) or a combination of postpaid, prepaid and fixed-wireless access as in the case of AT&T, T-Mobile and Verizon).

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

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

    Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

  6. Mobile network codes in ITU region 3xx (North America)

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    This list contains the mobile country codes and mobile network codes for networks with country codes between 300 and 399, inclusively – a region that covers North America and the Caribbean. Guam and the Northern Mariana Islands are included in this region as parts of the United States.

  7. Roaming - Wikipedia

    en.wikipedia.org/wiki/Roaming

    The MAP SRI message contains the MSISDN number and with this MSISDN the HLR will obtain the IMSI. Because of past location updates, the HLR already knows the VLR that currently serves the subscriber. 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 ...

  8. Vodafone - Wikipedia

    en.wikipedia.org/wiki/Vodafone

    Vodafone Group Plc (/ ˈ v oʊ d ə f oʊ n /) is a British multinational telecommunications company.Its registered office and global headquarters are in Newbury, Berkshire, England. [5]

  9. Mobile network codes in ITU region 5xx (Oceania) - Wikipedia

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    This list contains the mobile country codes and mobile network codes for networks with country codes between 500 and 599, inclusively – a region that covers Oceania, Maritime South East Asia, and Thailand. Guam and the Northern Mariana Islands as parts of the United States are listed under Mobile Network Codes in ITU region 3xx (North America).