China Unicom card cannot send text messages to mobile card

The reasons why the mobile phone cannot send text messages are as follows:

1. The mobile phone has not activated the SMS service. You can contact the local customer service or go to the local business office to activate this function;

2. The SMS center number is not set or is set incorrectly, just reset it;

3. The signal is weak, there is no signal or the mobile phone battery is low, causing the message to not be sent normally;

4. Due to the busy system, especially during the peak period of SMS sending during holidays, it is recommended that you try again later or avoid the peak sending period;

5. The sending format is incorrect. If sending a text message to a PHS user, the area code must be added before the number;

6. The SMS sending retention period is valid for 24 hours;

7. Are the SMS inbox and sending box full? ;

8. It is recommended that you restart your phone or change your phone to test it.

In addition to the above simple troubleshooting, if the problem still cannot be solved, you can contact the local manual customer service to handle it.