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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.
A SIM swap is a type of fraud where scammers trick a mobile carrier into transferring a victim’s phone number to a device they control. This can be done by calling the company and impersonating ...
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.
SIM Application Toolkit (STK) is a standard of the GSM system which enables the subscriber identity module (SIM card) to initiate actions which can be used for various value-added services. [1] Similar standards exist for other network and card systems, with the USIM Application Toolkit (USAT) for USIMs used by newer-generation networks being ...
USSD can also be used to refill the balance on the user's SIM card and to deliver one-time passwords or PIN codes. Some operators use USSD to provide access to real-time updates from social-networking websites including Facebook and Twitter. [3] Between 2012 and 2018, the Wikipedia Zero project provided access to Wikipedia articles via USSD. [4]
MTN Group Limited (formerly M-Cell) [2] is a South African multinational corporation and mobile telecommunications provider. Its head office is in Johannesburg. [3] [4] MTN is among the largest mobile network operators in the world, and the largest in Africa.
Dialog Axiata PLC (Sinhala: ඩයලොග් ආසිආටා පීඑල්සී, romanized: Ḍayəlog Āsiāṭā PīElSī, Tamil: டயலொக் ஆசியாடா பிஎல்சி) (formerly known as MTN Networks and later Dialog Telekom), is one of Sri Lanka's largest [2] telecommunications service providers, and the country's largest mobile network operator with over ...
A key technical aspect of Mobile Number Portability (MNP) involves the routing of calls or mobile messages (SMS, MMS) to a number once it has been ported.Various call routing implementations exist globally, but the International and European best practice employs a central database (CDB) of ported numbers.