The short message indicates that there is something wrong with the network.

Sending SMS failed, but there is no problem in calling. Sending a short message prompts a network error, and so does retrying sending.

Solution:

Open the mobile phone operation page and click Find? "SMS \ Info" dialog box

After entering the SMS Settings menu, find the "SMS Center" inside.

SMS center number confirmation

After calling the service provider to confirm, the number of the SMS information center is set as shown in the following figure (SMS numbers of different service operators are different, for specific telephone consultation, Unicom Telecom customer service).

Other reasons for SMS sending failure:

Note that if there is no problem with the cell phone signal, you can't send a short message, the number doesn't exist, or the other party's network signal is not good, it will lead to the failure of sending. Or you can't send text messages during the current call.