Why can’t my Xiaomi phone receive the SMS verification code?

The phone card is in arrears. The SMS service of the mobile phone is provided by the operator. When the phone card is in arrears, the operator cannot send the SMS to the mobile phone and cannot accept the SMS. There may be situations where Xiaomi cannot receive the SMS verification code. SMS is text or digital information that users send or receive directly through mobile phones or other telecommunications terminals. The number of characters that users can receive and send in text messages each time is 160 English or numeric characters, or 70 Chinese characters.