Mobile phone cards can't send short messages to Unicom.

Unicom's failure to send short messages may be caused by the following reasons:

1, the mobile phone is normally turned on, and it may be impossible to send short messages when it is in arrears or actively turned off;

2. The number of SMS center in mobile phone is incorrect, and the number of SMS center in each region is different. For example, the SMS center number of Tianjin Unicom mobile phone card is+8613010130500. If it is a Unicom mobile phone card from other provinces and cities, you can call the Unicom customer service of the mobile phone card for consultation.

3. The SMS sending function of your mobile phone card is not enabled normally. You can use this machine to dial the Unicom customer service hotline 100 10 to which your mobile phone belongs, and ask the Unicom staff to help you check whether the SMS sending function of your mobile phone card is turned on normally. The mobile phone terminal is out of order, so you can't send short messages. You can put your mobile phone card on the mobile phone of your family or friends to see if you can send text 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 you can't send it, you can contact Unicom's customer service hotline 100 10 for consultation.