Joke Collection Website - Public benefit messages - Send a message to a number, how do you know if it is disabled?

Send a message to a number, how do you know if it is disabled?

If he stops, he won't receive your message. It's simple. Now there is a new service called SMS receipt. If received, the system will send a message to remind you. If you don't receive it, you will also send a message to tell you why the other party didn't receive it ~ ~