Excuse me, how to change the number of the SMS center? I lost that number earlier.

I can't send a short message, but it's not necessarily because the number of the short message center is set incorrectly. Of course, it cannot be ruled out. How to set the number of short message center: After you choose to enter the "Short Message" menu of your mobile phone, enter the number of short message center in the "Short Message Center Number" column, and press the OK key. This number will be stored in your card, and you can use short messages and various services directly without resetting.

The possible reasons are as follows

1. SMS service is not enabled on the mobile phone. You can contact the local manual customer service or activate this function in the local business hall.

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

3. 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;

4. Because the system is busy, especially during the peak period of sending short messages on holidays, it is suggested that you try again later or avoid the peak period of sending short messages;

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

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

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

8. I suggest you restart your mobile phone or change it to test whether you can send and receive short messages. If you can send and receive short messages, I suggest you plug the card back into your mobile phone and send yourself a short message to see if you can receive it. If not, I suggest you check whether there is a sim card problem, and take the mobile phone card to the local business hall for testing or replacement.