Has the short message been sent to prove that the other party has not blacked out?

This situation cannot prove that there is no blackening. It may be that the other party's mobile phone is normal, the signal problem, interception or shielding.

1, the other party's mobile phone is normal: if the other party's mobile phone is not faulty and turned on, there will often be text messages sent and a sending prompt will be received.

2. Signal problem: Even if the SMS shows that it has been delivered, it may be due to signal problems or other technical problems, resulting in the other party not actually receiving the SMS.

3. Interception or shielding: The other party may have used the interception function of the mobile phone or blacked out the number, so that even if the short message has been sent, the other party may not be able to see it.