Banks, how to open SMS to inform balance changes?

A new personal account change notification service is added to China Merchants Bank Card, which can remind you of the starting amount and whether to display the account balance. The opening channels are as follows: 1. Counter: Please bring your card account opening certificate and card/passbook, and go to the business outlet to open it with the withdrawal password. Passbooks can only be customized through counter channels. 2. Online banking (including popular version and professional version): Please log in to online banking, click the top horizontal menu "Account Management"-"China Merchants Bank SMS Service", click "Function Activation" under the page "Operation" and follow the prompts; 3. Mobile banking: Please log in to mobile banking, click My-Bank Card, click Bank Card, click Bank Card, click Other-China Merchants Bank SMS Service, and follow the prompts to open it. Tips: ① The original free notification service customization business has been suspended; (2) Current account change notification service, 3 yuan/month/card, free of charge three months before opening (including the opening month) (cancellation will no longer enjoy preferential treatment); (3) opened/cancelled on the same day, effective the next day.