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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. 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).

4. Roaming - Wikipedia

   en.wikipedia.org/wiki/Roaming

   For example, a postpaid subscriber of T-Mobile USA who is allowed to roam on AT&T Mobility and/or the regional carriers Viaero Wireless and U.S. Cellular's networks would have national roaming rights; prepaid providers on the other hand typically only allow a more restricted national roaming ability for cost reasons. For commercial and license ...

5. Boost Mobile - Wikipedia

   en.wikipedia.org/wiki/Boost_Mobile

   On July 17, 2024, EchoStar merged its prepaid Boost Mobile and postpaid Boost Infinite into a rebranded Boost Mobile; the company introduced new 5G unlimited plan offerings that would start at $25 per-month, and include both a 30-day money-back guarantee, and a promotion offering a price lock guarantee for postpaid subscribers.

6. Will a Prepaid iPhone Be Apple's Next Mega Opportunity?

   www.aol.com/news/2011-08-29-will-a-pre-paid-i...

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7. Dual SIM - Wikipedia

   en.wikipedia.org/wiki/Dual_SIM

   [1] [2] In countries where dual SIM phones are the norm, people who require only one SIM leave the second SIM slot empty. Dual SIM phones usually have two unique IMEI numbers, one for each SIM slot. Devices that use more than two SIM cards have also been developed and released, notably the LG A290 triple SIM phone, [3] and even handsets that ...