The subscriber you dialed is busy, and he will receive a text message to remind you that it has been blacked out.

It's not necessarily the cause of blackening.

1. When the other party is on the phone, the user will receive this prompt when dialing the other party's mobile phone.

2. If the other party is not convenient to answer the user's phone, you will receive the same prompt if you hang up or don't answer it.

If the line is busy, you can't get through. You can reconnect after the called party hangs up.

4、? It may be that the other party is shutting down or the signal is not good and it is not in the service area. In this case, you can try again after a while.

5. The other party's mobile phone is set to do not disturb mode. When dialing, the mobile phone is in do not disturb mode, so you can't dial.

Extended data

How to judge whether to be blacklisted:

1. When the other party's mobile phone is normal, call the other party, and there will be a beep when it is connected, and then prompt that the dialed phone has stopped or turned off, indicating that the other party has really blacked you out. Listen carefully, the sound of "beep" is very short and urgent, sometimes it is very light and can't be heard. When the other party's signal is bad, there may be no "beep" sound. Try a few more times.

2. The other party shuts down, and there is no "beep" sound when dialing, which is a prompt for direct shutdown.

3, no signal, basically no signal, call the other party's mobile phone, there will be a short period of time, and then you will be prompted that you can not connect.