What if the SMS function of the calling card is turned off?

If the SMS function is turned off, you can call customer service directly, switch the manual service to reopen according to the prompt, or reopen it in the local business hall.

The reasons why mobile phones can't send short messages are as follows:

1. No or wrong SMS center number is set, just reset it;

2. The signal is weak, there is no signal or the battery of the mobile phone is insufficient, resulting in the information not being sent normally;

3. The sending format is incorrect. If you send a short message to PHS users, you need to add the area code before the number;

4. SMS sending and retention is valid for 24 hours;

5. Whether the SMS inbox and sending box are full;

6. It is suggested to restart the machine or change the mobile phone to test it.