NCSOFT announced the pre-registration for the Korean version Lineage M today. You can pre-register for it from April 12, 2017 for the iOS and the Android version too. The game will be available first in Korean language from 2017 Spring / Summer after that in Taiwan, Hong Kong, Macau and later (maybe) in Japan and other regions.

The pre-registration link can be found on the official website of the game and above you can watch the latest promotion video.