What is the failure of sending short messages by mobile?

It may be because the SMS center number is not set.

The number of SMS center varies from place to place. First of all, you should know the principle of sending SMS. To put it simply, you compile the SMS and send it to the switch, and then forward it to the other party's mobile phone through the switch. There is a process of judging the calling party's attribution when you arrive at the SMS gateway. When the mobile phone with the set center number sends SMS, it will also send the signaling of the center number to the SMS gateway, so as to send it normally.

the format of the number of the mobile SMS center is: +86138 area code (if Chengdu is 28, write 28, the first digit of the four-digit area code is omitted, and the third digit area code is written after ), and finally it is 5. All of them are +86138285.

when sending a short message, it shows that sending is in progress, and after a while, sending fails. What's the matter?

Check SMS settings:

1. Open SMS settings and find the information center in SMS settings.

2. When you open it, you will see the number of the information center, which is a series of numbers with the area code of +86138 and 5. Click OK.

3. then click resend on the message that failed to send.

4. After the correct information center number is modified, SMS can be sent immediately.

5. network reasons. The arrears can be sent after paying the phone bill.