Contact the customer service of the bank card, they will ask you a lot of information when registering, such as company address, mobile phone number, home address and so on. When your answer is the same as when you signed up, they will help you revise it. This person who must be registered knows that it is equivalent to confirming your identity.
Method 2 of changing the reserved mobile phone number of the bank: bring my ID card and bank card to the bank counter outlets and tell the bank teller to modify the mobile phone number in the customer information.
Method 3 of changing the reserved mobile phone number of the bank: the personal system section of the bank in official website modifies the reserved mobile phone number.
Account management-customer contact information modification-mobile phone number.
Precautions:
The first method is suitable for credit cards;
The second method is applicable to all bank cards;
The third method is used by individual banks. Please select the operation according to the specific situation.