Still, some countries have opened up legitimately huge leads. The biggest standout is South Korea, where users enjoy LTE service 97 percent of the time. On carrier LG U+, it’s 99.6 percent, so effectively subscribers never have to fall back onto 3G. Korea is also home to the best-performing LTE operator in the world, Olleh, with time coverage of 96 percent and an average download speed of 30Mbps. SK Telecom and LG U+ are also near the top for overall performance.