KT Expands AI-Based Spam Blocking to All Customers, Cutting 4% More

Free for All Including KT MVNO Users False Blocking Rate 0.003% · Zero VOCs

Technology|
|
By Kim Ki-hyuk
||
Models listen to an explanation of AI spam blocking at KT Plaza in Gwanghwamun. Photo courtesy of KT - Seoul Economic Daily Technology News from South Korea
Models listen to an explanation of AI spam blocking at KT Plaza in Gwanghwamun. Photo courtesy of KT

KT (030200.KS) said on the 6th that it has expanded its artificial intelligence (AI)-based real-time spam blocking service to all customers, including users of KT's MVNO (mobile virtual network operator) service.

AI spam blocking is a service that detects and blocks new and modified spam in real time. KT developed the technology in-house to respond to increasingly sophisticated spam methods, such as the recent use of special characters.

The service was piloted in January this year, targeting 800,000 customers who set the smart blocking function to "High" in the "KT Spam Block" application. From the 29th of last month, the coverage of the existing free "(Peace of Mind) Spam Blocking Service" was expanded to all customers.

According to KT, the false blocking rate recorded 0.003% from the 29th of last month to the 3rd of this month. No related customer inquiries (VOCs) were reported. By blocking spam that had previously gone undetected, the total number of spam blocks increased by 3.5%.

KT also plans to launch a "Spam Blocking Real-Time Notification Service" within this month, which will notify customers of spam blocking records in real time. Choi Se-jun, an executive at KT, said, "The AI spam blocking function was developed to protect customers in real time from various spam and digital crimes." He added, "We will continue to update the service to enhance customer trust, and by advancing AI-based detection technology, we will build a prevention-focused customer protection system."

Companies in this story

Original reporting by Kim Ki-hyuk for Seoul Economic Daily.

AI-translated from Korean. Quotes from foreign sources are based on Korean-language reports and may not reflect exact original wording.

Watch · Seoul Economic Daily

More →
2:32

AI KEY

Preview
Korean Corporate Intelligence HubKOSPI · KOSDAQ · 12 sectors

A live, cap-weighted view of every KOSPI and KOSDAQ sector, with same-day Korean reporting distilled by company — built for foreign investors, correspondents and analysts who need to scan Korea before the next session.

Korea Company Atlas

Preview
Market Ontology · The Feedback LoopKFTC 2025 · 92 groups · 121,954 articles

An English ontology of the Korean market — how companies, the media, the government and the National Assembly move each other in a loop. Korea's named controlling persons and designated business groups are a mechanism, not a risk to be priced blind.

SIGNAL

Pre-register
English Edition · Capital MarketsM&A · IPO · PE · Fund Flows

Pre-register for SIGNAL English Edition — a premium subscription bringing Korean capital markets coverage (M&A, IPOs, private equity, fund flows) to global institutional investors. First access to the 50% introductory rate.