The more polite you are, the less you text.

If you are a Unicom mobile phone user, you can't send SMS for the following reasons:

1, the mobile phone card is not opened normally, and it may be impossible to send short messages in the state of arrears or active shutdown;

2. The number of SMS center in mobile phone is incorrect, and the number of SMS center in each region is different. You can call Unicom Customer Service, to which your mobile phone card belongs, for consultation.

3. The SMS sending function of your mobile phone card is not enabled normally. You can use this machine to call the Unicom customer service hotline 100 10, and ask the Unicom staff to help you check whether the SMS sending function of the mobile phone card is enabled normally.

4. Due to the failure of the mobile phone terminal, the short message cannot be sent. You can put your mobile phone card on the mobile phone of your family or friends and try it to see if it can send short messages. If you can, it means that it is a problem with the mobile phone terminal, and you need to contact the mobile phone terminal for after-sales consultation. If it cannot be sent, you can contact the Unicom customer service hotline 100 10 where your mobile phone card belongs for consultation.