Can I send a message to the other party when the phone is black?

Can send short messages. Even if the phone number is hacked by the other party, you can still send messages to the other party. This is because the sending of short messages does not need the confirmation or acceptance of the other party, and only when the mobile phone can connect the signal normally can it be sent successfully. The essence of hacking is a social function, which refers to blocking a contact in social software or mobile phone address book, so that the other party cannot receive other people's phone calls, text messages or social software messages. I believe many people have encountered this situation, that is, for various reasons, they deleted or blacked out each other from their contacts. The phone number is blacked out by the other party, which means that the message will not reach the other party, and at the same time it will not receive the reply from the other party. The other party will never see any message sent, which is also the most worrying problem for most people.