My card is Tencent Unicom Dawang Card. I've used it for half a year, and I can get a text message, but I haven't sent it to anyone. What happened?

Unicom number failed to send SMS prompt, which may be caused by the following reasons:

The mobile phone is in arrears or the balance is insufficient, which is one of the most likely reasons for not sending text messages. It is suggested to check whether the number is in arrears or insufficient balance. If you owe money or the balance is insufficient, you can pay the fee and try again.

Due to the limitation of frequently sending short messages or sending sensitive keywords (short messages involving pornography, fraud and politics), according to the requirements of the Ministry of Industry and Information Technology for spam message management, short messages that meet the interception strategy are intercepted.

The number of mobile phone short message center is wrong, so you need to set the number of short message center. You can contact your customer service for the number of the local SMS center.

There is something wrong with the mobile phone terminal. You can try again with another mobile phone.