Recommended applications for two-factor authentication sign-in

The following authentication applications are recommended for using two-factor authentication. 

If an account (FLaT) you have used before remains in the authentication application, such as a trial service, be sure to delete that account (FLaT). 

Use with "FLaT" displayed multiple times in the authentication application is not recommended. 

To change the two-factor authentication application or device, reset the settings and then reconfigure them. 

I want to reset two-factor authentication 

Refer to the FAQ below if you are having difficulties with two-factor authentication. 

Nothing happens even after scanning the two-factor authentication QR code 

I cannot sign in even after correctly entering the two-factor authentication code 

Refer to "Two-factor authentication user guide" for more information about the two-factor authentication function.