Modifying the reserved mobile phone number of a bank card can be done directly at the bank counter, or through online banking or mobile banking. Some banks also support customer service telephone repair

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1. Handling at the bank counter: All banks support modifying the reserved mobile phone number at the bank counter. Users need to bring their own bank cards and ID cards to their respective banks for handling. Some banks need users to fill in the corresponding application forms, while others only need staff to assist in modifying the mobile phone number at the self-service machine.

2. online modification: online modification of the reserved mobile phone number of your bank card requires that the user has already started online banking or mobile banking, and then logs in to his online banking or mobile banking APP, and the corresponding bound mobile phone number can be found on the personal information page, and the modification can be carried out as required.

3. Customer service telephone number modification: Some banks support users to directly dial customer service telephone number to modify the reserved mobile phone number. Users only need to dial the official telephone number of their bank, then select manual service, and operate according to customer service requirements to successfully modify it.

The bank's business can be divided into four categories:

asset business, liability business, intermediary business and off-balance sheet business.

1. Debt business refers to the business that commercial banks raise funds and form sources of funds, which is the basis of asset business and other businesses of commercial banks. Mainly including deposit business.

2. Asset business refers to the business in which commercial banks use funds through various channels to obtain income. Including: cash business, loan business and investment business.

third, intermediary business: it is a business in which commercial banks do not directly undertake or form creditor's rights and debts, and do not use their own funds to handle payments and other entrusted matters for customers, but collect handling fees from them. The intermediary business of commercial banks mainly includes settlement business, agency business, consulting business and custody business.

4. Off-balance-sheet business: business conducted by commercial banks that is not included in the balance sheet and does not affect the total assets and liabilities of banks. Including: guarantee, financial derivatives business (such as forward foreign exchange contracts, currency swaps, currency futures, currency options, interest rate swaps, interest rate options, stock indexes, futures and options, etc.).