Who is operating the bank SMS notification, and is the balance in and out correct?

Banking business. Bank balance change reminder is a free service launched by banks. Operated by the bank, its function is to send short messages to customers' accounts when there are incoming and outgoing accounts, so as to know about the incoming and outgoing situation of bank card funds and accurately display the incoming and outgoing balance. Banks are financial institutions established in accordance with the law to operate monetary credit business, and they are the products of the development of commodity monetary economy to a certain stage.