The South Korean Ministry of Science and ICT has warned that the country is likely to miss the current approximate deadline at which 5G should be available in the country. This was estimated to be at the end of March, but now may be pushed back until later in the year. The authorities have cited costing disputes with providers as one factor in this delay.
https://www.notebookcheck.net/South-Korea-now-faces-5G-roll-out-delays.413779.0.html