When you start playing, you will have to choose one of the game servers and will then be automatically redirected there when you tap the "Start" button.

However you can decide to change server and create new characters:
  • From the Main screen, tap the "Select Server" button in the bottom left.
  • From the game Settings, tap "Select Server" to be redirected to the Main screen where you can change the server.
Note that it is not possible to transfer characters or items from one server to another!