Joke Collection Website - Public benefit messages - What does it mean that there is a red triangle exclamation mark on the envelope of the short message sent by vivo mobile phone?

What does it mean that there is a red triangle exclamation mark on the envelope of the short message sent by vivo mobile phone?

A red exclamation mark will appear on the sent SMS, indicating that the SMS has not been sent. I suggest you confirm whether your mobile phone is in arrears first. In addition, it may be because the number of the SMS center has been changed. You can enter the information interface and press the left key of your mobile phone to enter the settings to correct the number of the SMS center, or please consult your local operator.