Why can't I send some of my group messages? Prompt message not sent, there is a red triangle with exclamation mark in the lower right corner of the message! take out

See if your mobile phone is in arrears. You can't send and receive text messages when you stop. Or whether the SMS center number is set correctly, please consult the operator for details.

Check whether there are sensitive words in the short message content, or send duplicate content to the same number, resulting in being blocked by the operator. You can consult your local operator.

If the mobile phone is in a place where there is no signal or the signal is weak, the message may not be sent successfully. You can try again where the signal is strong.

In addition, the network system is busy, especially during the peak period of holiday information transmission, and faults may occur. It is recommended to avoid the peak period.

If the above methods can't be solved, it is recommended to back up important information, restore factory settings or upgrade the mobile phone system and try again.