1. SMS reminder: During credit card maintenance, the bank will send an account change reminder to the cardholder by SMS, and the cardholder needs to ensure that the contact information such as mobile phone number is correct and keep the mobile phone open.

2. mobile banking app reminder: most banks have mobile banking apps, and cardholders can set account change reminder function in the app. When the account changes, the mobile banking app will send a notice to the cardholder.