Do I have to go to the business hall to change the mobile phone number reserved by the bank card?

You don't have to change it in the business hall. There are other ways:

The first method: it can be modified on the mobile banking app. Log in to your mobile banking, and then go in and check the information. After checking the information, you can change the reserved mobile phone number.

The second method: modify through online banking. The method is similar to the modification of mobile banking app. We also need to check our information and then modify it. The reserved number will be replaced after modification.

The third method: call the bank staff to modify the number. Call the customer service number on the back of the bank card and follow the customer service prompts. Customer service will tell you how to modify it. Personal information will be checked and the pre-stored number can be modified after the information is confirmed to be correct.

Extended data:

The reserved telephone refers to any one of the mobile phone, home phone, work phone and emergency phone registered by the customer at the bank for the last time. Most of them are reserved mobile phone numbers, and the security information can be verified by receiving the verification code through the mobile phone, which is convenient for self-service banking.

Reserved numbers are generally used to inform information, such as the flow of funds in bank cards. Without the reserved number, the information cannot be conveyed in time. When modifying the reserved number, be sure that the mobile phone number is frequently used and is your own to protect your property.

References:

Reserved telephone-Baidu Encyclopedia