The South Korean government has fined the country’s three mobile network operators for making exaggerated claims about the capabilities of their 5G services. The Korean Fair Trade Commission found that SK Telecom, KT Corp, and LG U+ had falsely advertised the speed of their 5G services, including their own offerings. The telcos had claimed to offer 20 Gbps services, although such speeds are not achievable in real-world environments. The fines, totaling 33.6 billion won (US$25.5 million), are the second-highest ever imposed by the FTC for illegal advertising. While the fines may not be significant for the telecoms operators, they demonstrate that even leading 5G markets are not immune to overplaying new services to attract customers. This case is the first time telcos have been held to account for illegally advertising network speeds.