How to solve the problem that China Unicom can't receive SMS?

1. Unable to receive all SMS messages: SMS inbox is full; 2. SMS with personal number can't be received: it should be because of the sender's problem or system interception, which leads to the failure to receive personal SMS; 3. You can't receive short messages with different network numbers: you sent illegal short messages to mobile/telecom, which were restricted by the other operator.