Huawei 4C cannot send text messages but can receive them

Hello, there are many reasons why SMS sending fails. Please check whether the SMS center settings are correct (Information-->Menu-->Settings-->Advanced-->SMS Center-->Check whether the value Correct) Please consult the corresponding mobile service operator for the specific SMS center number. Incorrect SMS center will cause SMS sending failure. Then check whether the operator prohibits sending text messages, please call the operator's customer service number to change. Please change to a normal card, test whether it can be sent normally, and troubleshoot the card problem. Especially when using this card for the first time.