Take China Construction Bank as an example. After unbinding, you need to register and log in with your current mobile phone number. If you change your mobile phone number, please register with the new mobile phone number. If the business can't be used normally, you need to change the registered mobile phone number at the bank.

The credit card login method is as follows:

Start the APP and click "Credit Card" in the menu bar at the bottom.

2. After switching to the "Credit Card" page, click the "Lock" icon at the top and middle to log in to your account.

3. After logging in, you can see your "Credit Card" information, and the displayed status is "Inactive". Click "Activate Card". Just complete the activation and set the password.