Preparation tools: mobile phone, ICBC APP.

1. Enter the "My" option of the ICBC APP and select the "Security Center" option on the interface.

2. Find the "Mobile Phone Number Management" option on the Security Center interface and click on it.

3. When you see the current personally bound mobile phone number on the interface, click the "Change" option.

4. Change the mobile phone number information of the replacement to complete the change of the mobile phone number reserved for the ICBC credit card.