What should I do if my mobile phone sends a text message saying "Send function is disabled"?

To turn on/off the video calling function of the mobile phone:

Enter Dial → More → Settings → Call Settings → Click on the SIM card corresponding to the mobile phone → Turn on the video call function → Check/uncheck.

What should I do if my mobile phone sends a text message saying "Send function is disabled"?

When the mobile phone sends a short message, "Send function is disabled" is displayed. You can exclude it in the following ways:

1. Tencent Mobile Manager → Click on the avatar in the upper right corner → Settings → Secure SMS → Turn off the "Secure SMS" function;

2. Settings → Application Management → Configuration Application → Default Application → SMS → Information;

3. Uninstall the installed third-party software such as App Store and QQ Synchronization Assistant;

4. Back up important data and restore factory settings.