The line is always busy on the phone. How to tell whether the other party is intentionally hanging up or has been blacklisted?

If you make a phone call, it starts with a beep, and then suddenly you say you are on the phone, then the other party will hang you up. If you call directly and say that you are on the phone, then you are either really on the phone or hacked.

After joining the blacklist, it has the following characteristics:

1, the incoming call has been unable to connect, the network is busy, there is no signal, and there is an incoming call;

2. Send a text message and never reply; ?

3. If you call with another mobile phone number, there is no such situation, which means that you have joined the phone blacklist.

Extended data:

Why you can still call in after blacklisting the other party's number on your mobile phone:

First, the security housekeeper software on the mobile phone has stopped running (some mobile phone screen locking and background cleaning applications will stop running), resulting in harassment interception failure;

Second, although the other party's number has been blacklisted on the mobile phone, the interception function has been turned off, so the interception will fail;

Third, dual-card mobile phones, only one card is blacklisted and the other card is not blacklisted;

Fourth, the security housekeeper only set up SMS interception, not call interception;

5. Interception of the blacklist of fixed telephone numbers in the same urban area, which does not include the area code, leads to interception failure.