I bought a new mobile phone card and stuffed the information into it, but it always failed. Neither the opposite nor myself is in arrears. What happened?

You should mean the newly bought mobile phone card, and sending text messages to the other party has been unsuccessful. If yes, there are generally several possibilities: 1, the SMS function of the newly bought card has not been activated, so it is recommended to call first or directly report it to customer service; 2. The number of SMS center is set incorrectly. The SMS center number of a mobile phone is different from place to place. You can tell the customer service, and he will send you a text message to teach you how to set it up. 3. The network signal there is not good; Or if the network is busy and the transmission is unsuccessful in a short time, you can change places or time periods.