SK Telecom and LG Uplus will begin the first fifth-generation (5G) roaming services in Switzerland and Finland, respectively, in partnerships with local mobile carriers, the two South Korean companies said Tuesday.

SK Telecom said its roaming services in Switzerland will begin today, with users of the Samsung Galaxy S10 5G and SKT's 5G subscriber plan to be able to connect to Swisscom's 5G networks when visiting Switzerland. A software upgrade on their smartphones will be previously required.

The telecom company plans to provide a software upgrade to LG V50 ThinQ users soon so their mobile phones can run on 5G networks in the European country, the firm said. It will continue to expand the number of countries where its subscribers can use 5G roaming services.

Swisscom is the No. 1 mobile carrier in Switzerland with 6 million subscribers. The company began its 5G networks services on April 17 and currently offers the services in 110 cities including Zurich, Geneva and Bern.

SKT subscribers will be able to use high-quality data-heavy services such as video streaming as well as AR and VR content through the roaming service in Switzerland, the company said.

LG Uplus will begin its roaming service in Finland, Friday, in partnership with Elisa telecom company.

LG V50 ThinQ users with LG Uplus' 5G plan will be able to use data through 5G networks when visiting Finland.