Why can't Xiaomi miui7 send free text messages?

First, there is something wrong with the signal. Observe whether the mobile phone on the same network around you has the same situation.

Second, there is something wrong with the SMS settings. Check whether the SMS center number is normal.

Third, the third-party software has set the function of limiting sending short messages, so turn off this option or uninstall it directly;

Fourth, the arrears, check the phone bill.

Fifth, cancel the SMS function and call customer service for consultation;

Sixth, the mobile phone problem, it is recommended to back up the data first and then restore the factory settings. If the above tests are not enough, then go to after-sales service.