Connectivity — South Korea
What travelers need to know about connectivity in South Korea. What is legal at home can be a serious crime here — each rule links to its official source.
Connectivity in South Korea: prohibited — what is legal at home can be a serious crime here.
Do not bring a signal jammer to South Korea. The Radio Waves Act allows jammers to be used only by the state for listed public-safety operations - presidential security, military activity, counter-terrorism, stopping violations at airports, physical protection of nuclear facilities and related police work - and manufacturing, importing or selling one without authorization from the Minister of Science and ICT is a crime. The Act also makes it a crime to disrupt radio communications by impairing radio equipment "by any other method".
Manufacturing, importing or selling a jammer without authorization: up to 3 years' imprisonment or a fine of up to KRW 30 million (Radio Waves Act art. 84 item 1-2, with art. 29(5)). Disrupting radio used for telecommunications, broadcasting, policing, weather, power supply or rail, ship and aircraft operation by impairing radio equipment: up to 10 years or KRW 100 million; any other radio equipment: up to 5 years or KRW 50 million; attempts are punishable (art. 82).
§ Korea Ministry of Government Legislation, official statute portal law.go.kr (DRF open API) - Radio Waves Act (전파법), Act No. 21065 promulgated 1 October 2025, enforcement date 2 January 2026, arts. 29, 82, 84, read in the authoritative KoreanVerified Sep 20, 2026