Extend or re-activate an existing account while you keep existing line username, use this extend function with first priority, otherwise system is going to create a new random username.
New Subscription with new random line username
If you want to buy a NEW or additional Subscription with a new random line username, please open left menu Order & Transaction (If you want to extend an existing line username then please use above extend function.)
=> You do NOT keep old line username when you hit this button. If you want to keep old line username, then hit EXTEND button, that’s important. <=