4G and even LTE-Advanced seem so last generation now that South Korea has revealed plans to build a 5G network. The country’s communications technology ministry will put in 1.6 trillion won ($1.5 billion) and work with local firms through 2020. The 5G network is expected to be 1,000 times faster than the existing LTE network, which means users can download an 800-megabyte movie in just one second.