If you have a number, you can send a text message. If you owe money, can you receive it? Stop. Can you read me? If I can send it out.

When you said you could send it, you probably said you sent a hint. However, if the other party stops, it will also be sent. If it is off, it will display unsent. So it means that the other party received it or the other party stopped.

Mobile or Unicom services do not accept downtime arrears.

Even if your mobile phone can send it, but the other party is in arrears and stopped, it is impossible to send a text message to the other party;

If the other party pays the fee, you send it before paying the fee, and the other party will not receive it.