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  2. One Tech Tip: Protecting yourself against SIM swapping - AOL

    www.aol.com/news/one-tech-tip-protecting...

    SIM-swapping is a growing form of identity theft that goes beyond hacking into an email or social media account. In this case, the thieves take over your phone number. Any protections consumers ...

  3. 'This could happen to anybody': California man says a hacker ...

    www.aol.com/finance/could-happen-anybody...

    Over 1,000 victims lost more than $48 million to SIM swap crimes in 2023, according to the FBI’s Internet Crime Complaint Center. The reason SIM swapping is so alarming is it doesn’t require ...

  4. SIM swap scam - Wikipedia

    en.wikipedia.org/wiki/SIM_swap_scam

    A SIM swap scam (also known as port-out scam, SIM splitting, [1] simjacking, and SIM swapping) [2] is a type of account takeover fraud that generally targets a weakness in two-factor authentication and two-step verification in which the second factor or step is a text message (SMS) or call placed to a mobile telephone.

  5. Mobile number portability - Wikipedia

    en.wikipedia.org/wiki/Mobile_number_portability

    Maximum 1 working day – would be activated the successive day Free, operator can impose SIM card charges if any The National Numbering Committee, established by ictQATAR has taken care of the MNP management. Currently both Ooredoo and Vodafone Qatar allows Port in and Port out for Prepaid and Postpaid Services Saudi Arabia: 2006.07.08 Free

  6. Unstructured Supplementary Service Data - Wikipedia

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

    USSD is commonly used by prepaid GSM cellular phones to query the available balance. The vendor's "check balance" application hides the details of the USSD protocol from the user. On some pay as you go networks, such as Tesco Mobile, once a user performs an action that costs money, the user sees a USSD message with their new balance.

  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).

  8. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks.

  9. 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.

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