South Korea\'s Ministry of Science and ICT and the Korea Information Society Development Institute published a casebook summarising eight years of telecom service system improvements, released at the first 2026 advisory committee meeting held on April 22. The advisory panel reviews consumer inconvenience and dispute cases and seeks improvement measures. The casebook covers 56 cases from 2018 to 2025, including limits on short-term multi-line sign-ups, fee waiver of cancellation penalties in disaster areas, and improvements to dark patterns in add-on service subscriptions.

LG Uplus has begun replacing SIM cards for all customers due to an issue with the design of its International Mobile Subscriber Identity (IMSI), with 185,060 customers having booked store visits by April 12. As of 8 p.m. on April 12, 169,873 mobile network operator customers had made reservations, or 1.4 percent of all customers. MVNO customers made 10,687 reservations, or 0.2 percent of eligible customers.