[Issues & Accounts] How can I bind account on an iOS device?
To protect your game progress from being lost, please bind your account with a Game Center or Facebook account. Click on your avatar→Settings→Account→Account Management, and choose Game Center or Facebook to bind your account.
Please note: A Game Center or Facebook account can only be bound with one game account. Therefore please check whether your Game Center or Facebook account has already been bound with another Guns of Glory game account before you bind your game account.