1. Bank counter change: Cardholders can bring their valid identity documents and bank cards, fill in the information change application form at the issuing bank outlets, and then go to the counter to handle it.

2. Telephone banking: The cardholder dials the customer service number of the issuing bank, selects "Manual Service" according to the voice prompt, and then completes relevant operations according to the prompt of the customer service staff.

3. Online banking: If the cardholder changes the reserved mobile phone number in this way, he must first activate the online banking function of the card, and then insert devices such as U shield into his computer and log in to online banking to modify the reserved mobile phone number.

If you have any other questions, I suggest you call the bank customer service staff.

Modify the reserved mobile phone number of the bank card. If there is a professional online banking, you can change it directly without changing the service mobile phone number. The reserved number is different from the service number. If the professional online banking cannot be changed, you need to bring your personal ID number and credit card to any business outlet of the corresponding issuing bank for counter handling.