https://www.cnet.com/news/samsungs-galaxy-s10-5g-can-download-content-in-korea-at-lightning-fast-1gbps/

5G, the next generation of cellular technology, promises to boost internet speeds, coverage and responsiveness for wireless networks. It'll enable functions such as accommodating more internet of things devices and streaming HD videos on mobile networks. 

KT said 5G will be available to users in 85 cities in Korea by the end of the month. US carriers are also scrambling to roll out the technology. Verizon launched a limited 5G home broadband service last year, and the company plans to roll out mobile 5G service in 30 cities this year. AT&T's 5G network went live in select cities in December, though customers can only access it using Wi-Fi hotspots. The company also plans to launch mobile 5G in 2019.