This is a big deal for South Korea, as it becomes the first nation with LTE offered by each of its mobile carriers and ubiquitous access to 4G coverage inside its borders. Unfortunately, a massive appetite for data — the country ranks first in overall usage — makes unlimited plans simply unrealistic, according to KT CEO Lee Suk-chae. Still, the company is taking measures to help customers avoid overage fees, which becomes significantly easier to do with 4G speeds. It provides users with a buffer of 20 percent additional data for the first three months, and offers the option of cutting off access upon hitting the tiered ceiling. Finally, KT touts its continued investment in a consistent and reliable network, most recently with the development of Warp, described as a virtual station comprised of 144 cell cites that can dynamically shift resources to account for congestion.