1. Upgrade: The banking system is being upgraded, resulting in the temporary interruption of SMS reminder service. The purpose of the upgrade is to improve the performance and security of the system and ensure that customers' funds and transaction information are better protected.
2. Trading risk: There are certain risks in the current trading environment. In order to ensure the security of customers' accounts, the bank temporarily stopped sending SMS reminders. This is to prevent malicious attackers from using SMS verification code for illegal operations and ensure the safety of customers' funds.
3. Technical problems: The bank's SMS reminder service is facing technical problems, causing users to suddenly stop receiving SMS reminders. Technical problems involve SMS platform, network connection, etc., which need to be checked and repaired by the technical team of the bank.