Joke Collection Website - Public benefit messages - Did the other party get a hint when sending a text message? Is there any software to watch?

Did the other party get a hint when sending a text message? Is there any software to watch?

There are several possibilities:

1, the online merchant didn't choose the right one. You can try to send a message to others to see if it is successful.

2. The mobile phone has the function of prompting the other party to receive the short message, but the other party's mobile phone is not turned on, and it may be that the prompt has not been received.

3. The other party's mobile phone is outside the country or where the signal is not allowed.

I don't want to see this. The other party blocked the number with the shielding setting, which means it was hacked.