Okay.... I had the steps, translation and etc. for downloading the game, but it all disappeared when I tried to post it. So, I'll just summarise what I was gonna say, I may accidentally leave some steps because I'm trying to remember from the top of my head.
I managed to download the game by trial and error. Apple users I believe you guys can just change your regional settings to however you want but for this change to some Asian region (recommend JP you have a lot of access from there).
For Androids we have a longer process: (either use QooApp/ Apkpure or your own preferable app downloader) - for me Apkpure worked for me
You may need to go to your setting an allow your internet webpage to download/install files - you'll need this for updating the client later on
QooApp:
[1] Use your app installer and download the Noblesse package and install - however due to the recent client update you might find difficult updating it. (why I changed to apk) >>you don't require a vpn to download the game
Apkpure: >>reccommend to not use the app version<<
[1] Open your internet and open Apkpure
[2] Scroll down on the apk page until you find 3 boxes for changing your regions >>change it to internation/global<< no vpn required
[3] Download Noblesse with NAVER WEBTOON not NoblesseM and install it
Game:
[1] Once you open it it'll instantly ask permission for your contacts, photos/files & media and phone calls >>YOU MUST ACCEPT ALL OF IT<< if you accidentally deny it asks you to reset app if you want to use it. The left side will way 종료 = end/close app 재시작 = reset/restart (something like that but just know that it's on the right) and you'll have to accept it all again
[2] It'll then ask youu to accept their terms and conditions - accept both
[3] If something appears something similar to 새 게임 클라이언트. (client) it's saying that the game has updated and you need to update it (this may appear for QooApp because they haven't updated the file from the 4/10/2018 update (dd/mm/yyyy). >>>why I changed to apk<<<
[3.1] You can do whatever you like to update the client but went with apk
[3.2] Now, you may also suffer from another problem which is Wi-Fi connection (if you frequently experience poor internet connection) >>I just used my mobile data<< recommend to use your data if it has newly been recycled or have more than 35GB left for the month. Also, use your VPN app incase if your suffer from further connection problems, or fragment your download (e.g. let it download for 30min and take a break for an hour or so but make sure that you have exited from the app and closed it before reopening it).
The game is initially 80.2MB but when downloading it's resources it's 901.7MB >>it'll take a while to download especially if your using data or fragmenting your download.
If you don't understand some of the request just use G-translate it's pretty accurate to what it means, but it'll take a while to individually write down the characters.