5G use cases can be categorized into three main types of connected services:
Enhanced mobile broadband - 5G internet will not only make smartphones better, but it will also enable users to experience new immersive technologies, such as virtual reality and augmented reality, data rates that are uniform and faster, low latency, and smaller cost-per-bit.
Mission-Critical communications – The 5G infrastructure will enable services that can transform industries with ultra-reliable, low latency links—such as remote control of critical infrastructure, vehicles, robots, and medical procedures.
Massive Internet of Things – 5G wireless technology will seamlessly connect an enormous number of embedded sensors, subsequently making IoT more scalable and secure.
The first substantial deployments of 5G were in April 2019. In South Korea, 38,000 base stations were claimed by SK Telecom, 30,000 by KT Corporation and 18,000 of which 85% are in six major cities. They are utilizing 3.5 GHz (sub-6) spectrum in non-standalone (NSA) mode and the speeds tested ranged from 193 to 430 Mbit/s down.
Verizon, in the US, opened their service on a very limited number of base stations in Chicago and Minneapolis utilizing 400 MHz of 28 GHz (mm Wave) spectrum in NSA mode. In May, download speeds in Chicago ranged from 80 to 900 Mbit/s. Upload speeds varied from 12 to 57 Mbit/s. The round-trip delay time was 25 milliseconds. In the May of 2019, it was reported that Verizon's 5G service would regularly hit 1 Gbit/s in some locations.