Link Google Authenticator
1. Visit okex.com, log into your account, click account page, Security-Google Authentication-Settings.
2. Download Google Authentication app from your app store.
3. Scan the QR code with the app, fill the code into Google Authenticator: 
How to Disable Google Authenticator
To disable Google Authenticator:
1) registered phone number is available for phone call, please contact service support , removing it by verifying basic information via phone call.
2) If not, please send ID/passport document via registered email and request to [email protected]