The 2nd hit on Google was https://www.ericsson.com/en/cases/2019/sk-telecom-has-switched-on-5g https://www.ericsson.com/en/cases/2019/sk-telecom-has-switch...

The 2nd hit on Google was https://www.ericsson.com/en/cases/2019/sk-telecom-has-switched-on-5g https://www.ericsson.com/en/cases/2019/sk-telecom-has-switch... So... Ericsson? Edit: although it also returned https://www.thefastmode.com/technology-solutions/13349-sk-telecom-selects-samsung-ericsson-and-nokia-for-5g-rollout https://www.thefastmode.com/technology-solutions/13349-sk-te...