Switzerland, Bahrain and the United Kingdom have all followed in the weeks since.
5G offers faster download speeds and lower latencies – the lag between sending a command and receiving a response – among other benefits.
About 85 South Korean cities will have 5G connectivity by the end of the year, and its Ministry of Science and ICT has said that local networks will begin installing kit at airports, train stations and large shopping centres from next week to boost coverage.
However, earlier this week, Samsung suggested the industry had yet to deliver a “killer app” to take advantage of 5G’s new capabilities, adding many consumers had signed up in such droves only because of attractive data packages and cut-price handsets offered to drive demand.
The local Yonhap news agency has cast doubt over whether the industry can continue to offer similar deals without threatening its ability to make a profit .
Even so, it said, companies had forecast there would be more than four million 5G subscribers in the country by the end of 2019.