Why did I change my mobile phone number bound to the bank card, or did I receive a text message from the previous number?

There are several mobile phone numbers bound to bank cards, including online banking, telephone banking, mobile banking, SMS notification, and mobile phone numbers reserved for customer information, which can be set separately. I don't know which channel you changed your mobile phone number. I don't think you changed your phone number by SMS.

Change the handling of mobile phone numbers:

1. Changing the reserved mobile phone number of a bank card requires bringing my bank card and valid identity documents to the bank counter, which belongs to "special business handling" and is handled free of charge; Be sure to let the staff inform you by SMS after handling. The technical term is "mobile phone number of current account change notification service".

2. You can also plug in an online banking device and log in to online banking.

3. Enter the online banking interface, select the first option, personal bank login, and then select certificate login. It should be noted here that if you have an account number and password to log in with a user name, don't use it either, because self-service users can't do this business.

4. There is a menu at the top of online banking, and you can select a customer service item. In the customer service submenu with basic information, click basic information to modify your mobile phone number.