Joke Collection Website - Public benefit messages - Why is the message sent successfully, but the other party can't receive it?

Why is the message sent successfully, but the other party can't receive it?

There are multiple reasons why the other party can't receive the text message.

(1) Maybe the other party's cell phone signal is not good.

(2) It may be that the mailbox space where the other party's mobile phone stores short messages is full.

(3) It may be the phone itself. (4) The other party's mobile phone is in arrears and can't receive short messages.