Will not be any reason for my cousin to call and send messages.

1. SMS center number is not set correctly. Please re-enter the correct SMS center number.

2. No signal or insufficient battery capacity;

3. The system is busy during the peak period of holiday SMS 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 short message sending time exceeds 24 hours;

6. The mobile phone shields the short message sending function;

7. Blacklisted by SMS;

8. Insufficient quantity balance;

9.SMS inbox and outbox are full.

Second, the solution:

1, check whether the SMS center number is correct;

2. Whether interception software is installed, which makes it impossible to receive short messages;

3. Whether sending a large number of short messages in the early stage caused the short message function to be abnormal.

4. It is suggested to try again later or avoid the peak sending period;

Extended data:

Common troubleshooting of mobile phones:

Fault phenomenon: the mobile phone automatically sends short messages.

First, the reason for the failure:

1, which turns on the automatic flow calibration function of the mobile phone.

2.SIM card is bound with other services.

3. There is malware or virus in the mobile phone.

Second, the solution:

1. If you send SMS automatically after opening a software, it is recommended to check whether there are calibration settings in the software settings, such as calibrating traffic.

2. Put the SIM card of the mobile phone in other machines, observe whether there will be problems of the same version, and rule out whether it is related to the SIM card binding service.

3. If you only send SMS automatically in this mobile phone, please back up the data (contacts, information, pictures, etc. ) and try to restore the machine to factory settings.

If the problem still exists, please take the purchase invoice, maintenance card and machine to the service center for inspection and handling.