South Korea’s 5G launches have certainly been the gold standard in the very limited field of large-scale deployers so far. The country hit 2m subscribers to its three MNOs’ new services within four months of launch and the network has generally delivered high speeds and high usage levels. However, every early deployment has its teething troubles, and in South Korea, these are related to the Non-Standalone nature of the networks (which suggests the same issues may affect other MNOs, since every one has chosen an NSA route at first). When the connection has to switch from LTE to 5G, there is significant impact on latency and therefore response times and speeds, according to a detailed study by RootMetrics, the testing…