{"id":2815,"date":"2023-05-23T11:25:00","date_gmt":"2023-05-23T11:25:00","guid":{"rendered":"https:\/\/www.telesign.com\/sim-swap-detection-a-key-factor-in-fraud-prevention"},"modified":"2025-08-12T14:45:18","modified_gmt":"2025-08-12T14:45:18","slug":"sim-swap-detection-a-key-factor-in-fraud-prevention","status":"publish","type":"post","link":"https:\/\/www.telesign.com\/es\/blog\/sim-swap-detection-a-key-factor-in-fraud-prevention","title":{"rendered":"SIM swap detection: A key factor in fraud protection"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"#\" data-href=\"https:\/\/www.telesign.com\/es\/blog\/sim-swap-detection-a-key-factor-in-fraud-prevention\/#what-is-sim-swapping\" >What is SIM swapping?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"#\" data-href=\"https:\/\/www.telesign.com\/es\/blog\/sim-swap-detection-a-key-factor-in-fraud-prevention\/#signs-of-a-sim-swap-attack\" >Signs of a SIM swap attack<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"#\" data-href=\"https:\/\/www.telesign.com\/es\/blog\/sim-swap-detection-a-key-factor-in-fraud-prevention\/#how-to-protect-your-business-with-sim-swap-detection\" >How to protect your business with SIM swap detection<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"what-is-sim-swapping\"><\/span>What is SIM swapping?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>SIM swapping is essentially phone number theft. Fraudsters find out personal information about a victim, and then use that information to convince the victim&#8217;s wireless carrier to port their phone number over to a SIM card in the fraudster&#8217;s possession. Most of us have our phone numbers linked to our bank, email, and social media accounts, which is a goldmine to scammers, and why it&#8217;s so easy for them to conduct <a href=\"https:\/\/www.telesign.com\/resource\/product-spotlight-account-takeover-ato-protection\">account takeovers (ATOs).<\/a><\/p>\n<p>It&#8217;s one of the most damaging types of fraud imaginable because it gives fraudsters control over a user&#8217;s device. Criminals can drain accounts, purchase products, and transfer money all in a matter of a few hours. Very often, these ATOs are carried out by compromising common two-factor authentication methods, including SMS OTP (one-time password), which is the method by which a numeric or alphanumeric code is sent to a mobile number.<\/p>\n<p>As digital applications become more widespread, SIM swap fraud continues to be a threat with serious financial consequences. Many people are unaware of how prevalent it&#8217;s become; reports of SIM swap fraud have gone up by <a href=\"https:\/\/www.which.co.uk\/news\/article\/sim-swap-fraud-how-criminals-hijack-your-number-to-get-into-your-bank-accounts-aEzeh1P6N6Z8\">400%<\/a> in five years, and just last year in the U.S., SIM swap criminals stole more than <a href=\"https:\/\/www.europol.europa.eu\/media-press\/newsroom\/news\/ten-hackers-arrested-for-string-of-sim-swapping-attacks-against-celebrities\">$100 million in cryptocurrencies<\/a> by hijacking phone numbers.<\/p>\n<p><a href=\"https:\/\/www.telesign.com\/course\/protect-your-customers-and-business-from-account-takeovers\"><img decoding=\"async\" class=\"alignnone wp-image-13403 size-full\" src=\"https:\/\/www.telesign.com\/wp-content\/uploads\/2023\/08\/sim-swap-detection-a-key-factor-in-fraud-prevention-11.png\" alt=\"A person using a smartphone.\" width=\"1200\" height=\"350\" srcset=\"https:\/\/www.telesign.com\/wp-content\/uploads\/2023\/08\/sim-swap-detection-a-key-factor-in-fraud-prevention-11.png 1200w, https:\/\/www.telesign.com\/wp-content\/uploads\/2023\/08\/sim-swap-detection-a-key-factor-in-fraud-prevention-11-300x88.png 300w, https:\/\/www.telesign.com\/wp-content\/uploads\/2023\/08\/sim-swap-detection-a-key-factor-in-fraud-prevention-11-1024x299.png 1024w, https:\/\/www.telesign.com\/wp-content\/uploads\/2023\/08\/sim-swap-detection-a-key-factor-in-fraud-prevention-11-768x224.png 768w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/a><\/p>\n<p>Many companies think wireless carriers are actively monitoring and stopping these kinds of attacks, but researchers at\u00a0<a href=\"https:\/\/www.computerweekly.com\/news\/252476811\/Four-fifths-of-SIM-swap-fraud-attempts-succeed\">Princeton University\u00a0<\/a>found that 4 out of 5 SIM swap attempts are successful because major carriers are using insecure authentication, allowing a potential attacker to make a SIM swap happen even if they fail numerous challenges.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"signs-of-a-sim-swap-attack\"><\/span>Signs of a SIM swap attack<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Your customers may be victims of SIM swap fraud if:<\/p>\n<p>&#8211; Their phone number stops working and they are no longer able to make calls or send text messages<\/p>\n<p>&#8211; They&#8217;re no longer able to log into bank accounts or see transactions that they didn&#8217;t make<\/p>\n<p>&#8211; They receive a security alert email that login attempts were made from a different or unfamiliar location or device<\/p>\n<h2><span class=\"ez-toc-section\" id=\"how-to-protect-your-business-with-sim-swap-detection\"><\/span>How to protect your business with SIM swap detection<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Telesign&#8217;s <a href=\"https:\/\/www.telesign.com\/products\/phone-id\">PhoneID API<\/a> allows you to get detailed and actionable global phone number and subscriber data intelligence to strengthen authentications, evaluate fraud risks, and enhance the user experience. The SIM Swap functionality allows you to find out whether the SIM for a given phone number has been swapped and if so, at what point. In addition, Telesign evaluates how likely it is that the SIM swap was for a fraudulent reason using a scale from 1-4, allowing you to tailor SIM swap monitoring to any situation.<\/p>\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is SIM swapping? SIM swapping is essentially phone number theft. Fraudsters find out personal information about a victim, and then use that information to convince the victim&#8217;s wireless carrier to port their phone number over to a SIM card in the fraudster&#8217;s possession. Most of us have our phone numbers linked to our bank,<\/p>\n","protected":false},"author":4,"featured_media":16290,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[67],"tags":[172],"class_list":["post-2815","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-product-highlights","tag-sim-swap"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SIM swap detection: A key factor in fraud protection - Telesign<\/title>\n<meta name=\"description\" content=\"SIM swapping is essentially phone number theft. SIM swap fraud is still on the rise. 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