I sent a short message to Unicom number, showing that the message was sent successfully but the other party could not receive the short message.

1, you can check whether the short messages sent to all other numbers are not received. If yes, there may be a problem with the SMS function. Suggest calling customer service to refresh the network and restart the mobile phone. If it cannot be recovered, it needs to be fed back to customer service to check whether the data in the SMS center is normal.

2. See if the short message sent to mobile or telecom can't be received by the other party. In this case, it is intercepted by another operator and needs to be fed back to the customer service.

3. See if there is a short message blacklist on your phone.

4. If it's convenient, ask the surrounding users whether this phenomenon exists and eliminate the cause of local network failure.