Why can't my mobile phone receive the customer service SMS of China Mobile Unicom? . ?

If you can't send and receive SMS, you can try to restart your mobile phone or change your mobile phone to test whether there are any of the following situations: 1, the number of SMS center is set incorrectly; 2. There is no signal or the battery of the mobile phone is insufficient; 3. The system is busy during the peak period of holiday SMS sending, so it is suggested to try again later or avoid the peak period of sending; 4. The sending format is incorrect. If you send a short message to PHS users, you need to add the area code before the number; 5. The mobile phone shields the short message sending function; 6. Blacklisted by SMS; 7. Insufficient quantity balance; 8.SMS inbox and outbox are full. If the above situation has not been solved, it is recommended to contact the local manual customer service for handling.