Please familiarize yourself with the instructions on changing your nickname from various devices:
Enter the profile menu on the left side of the game's main screen --> Tap 'Profile' --> Tap either your nickname to the left of the avatar, or the 'Change name' button to the right.
Your nickname may be reset by the moderator team if it contains swear words or other symbols and words unsuitable for 12+ content. If you, for any reason, cannot change your nickname, please contact support. We'll be sure to help you.