How is there a red exclamation mark on the short message sent by vivo mobile phone?

A red exclamation mark will appear when the vivo mobile phone sends a short message, indicating that the message was not sent successfully.

If the mobile phone can't send information, you can refer to the following methods:

First, try to change a good signal area or time period;

Second, check whether the phone bill is sufficient or change a SIM card;

3. Go to Settings-Information-SMS Center Number-Check whether the SMS Center number is correct (the local SMS Center number can be searched online);

Specific operation steps (taking vivo X9 mobile phone as an example):

1, standby desktop entry setting

2. Information

3. SMS center number

4. Check whether the number of SMS center is correct.

4. Enter the phone settings-more settings-backup and reset/restore the factory settings-restore all settings (this operation will not lose the phone data).

Specific operation steps:

1, standby desktop entry setting

2, more settings

3, backup and reset

4. Select to restore all settings.

Note: This operation will not delete the data in the mobile phone, but will restore all the settings in the mobile phone, including the set wallpaper, unlocking method, WiFi, default startup program, etc. And the third-party software account registered in the mobile phone needs to log in again.