LG Uplus will build an AI-based voice spam response system together with the Korea Internet & Security Agency (KISA).

LG Uplus on July 7 signed a memorandum of understanding with KISA in its Magok office building in Seoul to strengthen responses to voice spam. The signing ceremony was attended by Choi Yun-ho (최윤호), head of the LG Uplus AI Business Group, and Shin Dae-gyu (신대규), head of KISA's Digital Foundation Headquarters, and other key officials.

Voice spam is spreading into a social problem as it can be used for voice phishing crimes beyond illegal advertising calls. A survey on spam reception volume in the second half of 2025 by the Korea Communications Commission and KISA showed that mobile voice spam rose more than twofold to a monthly average of 4.26 calls in the second half from 2.13 calls in the first half.

The key to the agreement is to advance a system to block spam calling numbers by linking LG Uplus' AI service ixi-O with KISA public data. LG Uplus aims to build a virtuous cycle of public-private data by linking spam report data held by the public sector with AI technology. It plans to move away from a system focused on post-incident responses and shift to a system that identifies suspicious numbers early and blocks them preemptively.

KISA's voice spam report data of about 15 million cases a year will be analyzed through LG Uplus' ixi-O to improve spam detection accuracy and shorten response times for spam numbers. LG Uplus will use AI to analyze call occurrence patterns and spam characteristics to predict spam risk levels. KISA will link this to a public blocking system to expand the scope of responses to new spam types.

LG Uplus plans to build an integrated response system covering suspicious fraudulent calls overall by expanding its response scope to include voice spam, following earlier cooperation with the National Police Agency to advance voice phishing prevention technology.

Choi said, "Through this agreement, we expect to further strengthen our user protection capabilities by linking public data and AI technology." He added, "We will continue to expand a virtuous cycle of public-private data to create an environment where customers can use telecommunications services more safely."