The steps are as follows: 1. Open your mobile app store, search and download bank credit card management applications, China Merchants Bank credit card, CITIC Bank credit card, etc.

2. Install and open the application, and then create an account according to the instructions of the application.

3. Log in to your account and add your husband’s credit card as a payment method.

4. Confirm whether her husband’s credit card information is correct, including card number, expiration date, security code and other information.

5. After completing the above steps, you can use your husband's credit card on your mobile phone for online payment, offline consumption and other operations.