You’ll need to download the Google Authenticator app on your phone to use it to link it to your account.
You can use the QR codes to go directly to your app store.

(QR codes for Apple's App Store and Google's Play)
Getting started
To set up your Google Authenticator, log in and go to Security Settings under the profile icon in the top right menu.

(Security Settings)
Go to Google Authenticator and click Add.

(Adding Google Authenticator)
Use the app to scan the QR code or enter your key manually in the app to link it on your phone.
You’ll need to enter two different codes to finish linking your accounts.

(Linking OKCoin and Google Authenticator together)
-
Go to Phone verification and click Get Code. We’ll send an SMS to your phone with a 6-digit verification code.
-
Next, open the authenticator app and get the code and enter the specific code for your OKCoin account that was just created. Be sure to enter it before it expire. Click Confirm to finish the set up.
Please keep your Google Authenticator key private and secure.
Removing Google Authenticator
You can unlink your accounts in your Security Settings by clicking Turn off.
(Turning off Google Authenticator for your account 1.0)
You’ll need to enter two different codes to unlink your accounts. The first is the verification code via SMS for the Phone verification, the second one is the code in your Google Authenticator app that it just created for your OKCoin account.
(Turning off Google Authenticator for your account 2.0)
Go to Phone verification and click "Get Code". We’ll send an SMS to your phone with a 6-digit verification code. Next, enter the Google Authenticator code for your OKCoin account. Click Confirm to finish the set up.