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  2. 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.

  3. Visa requirements for United States citizens - Wikipedia

    en.wikipedia.org/wiki/Visa_requirements_for...

    Visa requirements for United States citizens are administrative entry restrictions by the authorities of other states that are imposed on citizens of the United States. As of 2025, holders of a United States passport may travel to 186 countries and territories without a travel visa , or with a visa on arrival .

  4. Roaming SIM - Wikipedia

    en.wikipedia.org/wiki/Roaming_SIM

    Some providers achieve this automatic call interception and callback by encoding a program onto the SIM card. Other providers use Multi-IMSI (International Mobile Subscriber Identity) technology to lower the cost of roaming. In this case, there is a program on the SIM card that selects the lowest cost IMSI (or 'profile') to use in a specific ...

  5. OneSimCard - Wikipedia

    en.wikipedia.org/wiki/OneSimCard

    OneSimCard's proprietary global travel SIM card [4] allows customers to call from anywhere in the world [5] without incurring additional roaming charges. [6] OneSimCard offers free incoming calls in over 160 countries, outgoing calls from 25 cents per minute and data service from 10 cents/MB.

  6. Which countries still have Covid travel restrictions? - AOL

    www.aol.com/countries-still-covid-travel...

    The United States will finally align with most major tourist nations by scrapping its remaining Covid travel restrictions from 12 May 2023.. The current rules mean that many unvaccinated ...

  7. SIM card - Wikipedia

    en.wikipedia.org/wiki/SIM_card

    A typical SIM card (mini-SIM with micro-SIM cutout) A SIM card or SIM (Subscriber Identity Module) is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as mobile phones and laptops).

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