{"id":55742,"date":"2026-02-05T12:14:45","date_gmt":"2026-02-05T12:14:45","guid":{"rendered":"https:\/\/www.gsma.com\/get-involved\/gsma-membership\/?post_type=gsma_theme_resources&p=55742"},"modified":"2026-02-09T15:06:09","modified_gmt":"2026-02-09T15:06:09","slug":"tns-2026-robocall-report","status":"publish","type":"gsma_theme_resources","link":"https:\/\/www.gsma.com\/get-involved\/gsma-membership\/gsma_resources\/tns-2026-robocall-report\/","title":{"rendered":"TNS 2026 Robocall Report: How signed call gaps undermine mitigation"},"content":{"rendered":"\n

New data released today in the 2026 Robocall Investigation Report from GSMA Member Transaction Network Services <\/a>(TNS) shows continued progress in robocall mitigation among leading US telecom providers, including Verizon, US cellular, T-Mobile, Lumen, Comcast, Charter and AT&T. In 2025, 85% of traffic exchanged between Tier-1 carriers was signed, with 93% of signed calls receiving the highest \u201cA-level\u201d attestation.<\/p>\n\n\n\n

The report tells a different story for smaller carriers as the percentage of all signed call traffic between these carriers was only 17.5% last year. The wide gap reflects the fact that smaller carriers are moving far slower in modernizing from legacy switched networks to IP networks, allowing bad actors to conceal their robocall campaigns within these smaller carriers.<\/p>\n\n\n\n

\u201cSuccessful STIR\/SHAKEN implementations and proactive investments in network modernization have propelled tier-1 carriers to a strong position in the battle against unwanted robocalls,\u201d said Seth Walton, General Manager, TNS Communications Market. \u201cWhile smaller carriers face a fundamentally different financial calculus, the progress by tier-1 carriers reflected in our report signals that commitment to robocall mitigation beyond \u2018minimal compliance\u2019 efforts can yield tangible and sustained operational, business and customer satisfaction benefits.<\/p>\n\n\n\n

The latest edition of TNS\u2019 Robocall Investigation Report<\/a> highlights several new robocall insights and trends to inform carriers, regulators, policymakers and the telecom industry on what to expect in 2026:<\/p>\n\n\n\n

Decreased trust in attestation<\/h5>\n\n\n\n

Traceback efforts have been a critical component of STIR\/SHAKEN to identify the source of unwanted calls at the point of origination. However, call spoofing, vulnerabilities in smaller carrier call signing efforts and other bad actor tactics have exposed adoption limitations of STIR\/SHAKEN. The result: decreased assurance that calls signed with A-level attestation can be trusted as legitimate.<\/p>\n\n\n\n

SIM box fraud is an example of how bad actors are disrupting call attestation and trust in voice calls. SIM boxing enables scammers to originate fraudulent traffic within a carrier\u2019s trusted network, bypassing STIR\/SHAKEN checks to designate fraudulent calls with A-level attestation. Invalid attestation can be addressed through a comprehensive approach to robocall mitigation that leverages call analytics engines like TNS Call Guardian<\/a>, and Know Your Customer (KYC) capabilities that offer deeper visibility into call signature information.<\/p>\n\n\n\n

Multimodal and AI impersonation scam attacks are increasing<\/h5>\n\n\n\n

Over the past year, scammers have increasingly used AI-driven and multimodal attacks to impersonate trusted brands. One high-profile example followed a ransomware attack on Kettering Health, when attackers exploited a system-wide IT outage by targeting patients with coordinated robocall and robotext scams in an attempt to steal credit card information.<\/p>\n\n\n\n

Impersonation scams pose significant financial threats to Americans. Recent TNS survey data shows four out of five Americans believe imposter scams increased in 2025, and more than three-quarters (77%) of US adults say they are very concerned AI technology can be used to convincingly impersonate their voice or identity to access sensitive accounts. Furthermore, data shows more than half (54%) of Americans personally know someone who has lost money to an imposter scam.<\/p>\n\n\n\n

Smaller carriers can balance modernization with cost hurdles<\/h5>\n\n\n\n

Smaller carriers have historically faced legitimate barriers to network modernization due to limited bandwidth, prohibitive costs and lack of staffing for tech support. These obstacles continue to fade with the availability of industry solutions optimized for smaller carrier deployments.<\/p>\n\n\n\n

TNS\u2019 Hosted Cloud Connect, launched last month ,offers ILECs, RLECs, CLECs, MSOs and other providers a fully managed service for TDM-to-IP migration that modernizes their networks and helps reduce operational costs. It offers a seamless path for smaller carriers to transition to a voice architecture that is designed to meet robocall regulatory compliance requirements and facilitate a stronger STIR-SHAKEN ecosystem. For more information on the evolving robocall landscape, and how carriers and the broader telecom industry are fighting back against bad actors, request a copy of the 2026 TNS Robocall Investigation Report.<\/a><\/p>\n\n\n\n

Interested in Membership?<\/h4>\n\n\n\n

As a member of the GSMA, you will join a vibrant community of industry leaders, experts, and visionaries who are shaping the future of mobile technology and its transformative impact on societies worldwide.\u00a0Find out more about membership\u00a0here.<\/a><\/p>\n\n\n\n

<\/a><\/a><\/a><\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

New data released today in the 2026 Robocall Investigation Report from GSMA Member Transaction Network Services (TNS) shows continued progress in robocall mitigation among leading US telecom providers, including Verizon, US cellular, T-Mobile, Lumen, Comcast, Charter and AT&T. In 2025, 85% of traffic exchanged between Tier-1 carriers was signed, with 93% of signed calls receiving […]<\/p>\n","protected":false},"author":102,"featured_media":55744,"template":"","meta":{"image":"https:\/\/www.gsma.com\/get-involved\/gsma-membership\/wp-content\/uploads\/2026\/02\/TNS-Robocall.png","json":{"gsma_resources_type":"Other","gsma_resources_thumb":"[55744]","gsma_resources_file":"null","gsma_resources_multi":null,"gsma_resources_wgr":null,"gsma_resources_video":"","gsma_resources_image":"null","gsma_resources_url":"","gsma_resources_date":"","gsma_resources_button":""}},"tags":[],"resource_categories":[9670],"algolia_discover_type":[9664],"class_list":["post-55742","gsma_theme_resources","type-gsma_theme_resources","status-publish","has-post-thumbnail","hentry","resource_categories-blog","algolia_discover_type-article"],"yoast_head":"\nTNS 2026 Robocall Report: How signed call gaps undermine mitigation - Membership<\/title>\n<meta name=\"description\" content=\"Robocall Investigation Report launched by GSMA Member Transaction Network Services (TNS) shows continued progress in robocall mitigation among leading US telecom providers,\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.gsma.com\/get-involved\/gsma-membership\/gsma_resources\/tns-2026-robocall-report\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"TNS 2026 Robocall Report: How signed call gaps undermine mitigation\" \/>\n<meta property=\"og:description\" content=\"Robocall Investigation Report launched by GSMA Member Transaction Network Services (TNS) shows continued progress in robocall mitigation among leading US telecom providers,\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.gsma.com\/get-involved\/gsma-membership\/gsma_resources\/tns-2026-robocall-report\/\" \/>\n<meta property=\"og:site_name\" content=\"Membership\" \/>\n<meta property=\"article:modified_time\" content=\"2026-02-09T15:06:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.gsma.com\/get-involved\/gsma-membership\/wp-content\/uploads\/2026\/02\/TNS-Robocall.png\" \/>\n\t<meta property=\"og:image:width\" content=\"440\" \/>\n\t<meta property=\"og:image:height\" content=\"190\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@gsma\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"TNS 2026 Robocall Report: How signed call gaps undermine mitigation - 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