{"id":14423,"date":"2026-06-03T14:52:15","date_gmt":"2026-06-03T13:52:15","guid":{"rendered":"https:\/\/www.gsma.com\/solutions-and-impact\/technologies\/security\/?post_type=gsma_theme_resources&#038;p=14423"},"modified":"2026-06-03T14:54:12","modified_gmt":"2026-06-03T13:54:12","slug":"fs-1-1-use-of-sim-boxes-to-bypass-interconnect-communications","status":"publish","type":"gsma_theme_resources","link":"https:\/\/www.gsma.com\/solutions-and-impact\/technologies\/security\/gsma_resources\/fs-1-1-use-of-sim-boxes-to-bypass-interconnect-communications\/","title":{"rendered":"FS.01.1 Use of SIM Boxes to Bypass Interconnect Communications"},"content":{"rendered":"\n<p>This document defines various types of SIM box bypass, including on-net, off-net, international off-net and leaky PBX scenarios, and their impact on traffic flows, network planning and customer experience. It also outlines the mechanisms used to detect SIM boxes and describes how bypass techniques have evolved to evade detection.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This document defines various types of SIM box bypass, including on-net, off-net, international off-net and leaky PBX scenarios, and their impact on traffic flows, network planning and customer experience. 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