How to modify the mobile phone number of SMS reminder in ICBC mobile banking?

Please log in to mobile banking and select the function "Favorites-ICBC Messenger-My Messenger": 1. Select an account and click the "Modify" option to query/modify the SMS reminder mobile phone number of a single account, which will take effect in real time; 2. Click the "Set Mobile Phone Number" option to modify the receiving mobile phone numbers of multiple accounts at one time, which will take effect within 6 hours. Tips: 1. If the modified receiving mobile phone number is not credible, SMS verification code and U shield or password authentication are required; 2. Self-registered mobile banking customers, when modifying the mobile phone number for reminding balance changes, the receiving mobile phone number must be the registered mobile phone number or the existing mobile phone number of the sender.