02 1 displays bank notification reminder, and cannot dial in.

It means that the customer's account is bound to the mobile phone card through counter operation. If there is any fund change in the account, the customer will receive a SMS reminder in a short time to let the customer know the account change in time.

Short message service is a new business of cooperation between enterprises and telecom industry. Short message users can send short messages to users of China Mobile, China Unicom, China Telecom and China Netcom in real time or regularly in the form of web pages or software through the short message service platform.