DeSiM

DeSiM is a travel eSIM brand operated by 速報JAPAN株式会社, combining mobile connectivity with interactive travel content through a free LINE mini app. Designed for travelers, the service lets users explore daily quizzes, a six-type travel personality assessment, and a world puzzle featuring 126 countries and regions—all without downloading an app or owning a DeSiM eSIM. Games also include collectible badges, passport stamps, rankings, team competitions, and a gacha feature with dress-up items.

DeSiM sells eSIMs for popular destinations including South Korea, Taiwan, Thailand, the United States, France, Vietnam, Italy, and the United Kingdom. For purchased DeSiM eSIMs, users can check data balance and expiry dates in LINE, follow installation instructions, and troubleshoot connection issues with a self-check guide. The mini app can also link users to the eSIM shop for their next trip. LINE support is available 24 hours a day, 365 days a year. The mini app is free to use; eSIM purchases are paid, and eSIM management is limited to plans purchased through DeSiM.