When you try to log in with a new phone, you cannot log in bucause the connection between your Bitbank account and the authentication app is broken.
This is also happened in case the two-factor authentication app is uninstalled or the account is deleted.
If you have already changed your phone, please contact us to deactivate the two-factor authentication setting.
Please contact us by filling out the following form.
In case you have a previous phone with two-step authentication, you can deactivate its setting by yourself and reconfigure it with a new phone.
Please refer to the following FAQ.