There are several situations when the other party is on the phone.

The other party is on the phone, there are three possibilities: the other party is busy, don't bother, and the other party sees you hanging up.

1, the other party is busy.

The other party has been busy, and this happens when you call at this time. Of course, this possibility is not great, but it cannot be completely ruled out. You know, some people keep talking on the phone every day, or it happens to be a long time, maybe half an hour or more, so you can't call during this time.

However, if the other party's mobile phone turns on call waiting in the settings, a new call will be prompted on the mobile phone, and the other party can choose to answer your call and keep the previous call.

2. Do not disturb.

When the mobile phone is in Do Not Disturb mode, it will not accept any messages, including SMS, phone, WeChat ... and the system will turn off the message prompt tone. It is possible that the other person is resting, busy or in a bad mood. Of course, there is also the operation of intercepting strange numbers. You can only click on the phone in the phone address book, and unfamiliar numbers cannot be dialed in.

The other party hangs up when they see you calling.

This is usually easy to identify because it is prompted after the call is made. You can judge by the tone of the phone. In this case, the other party may be busy and have no time to answer your phone. Another possibility is that the other party is angry with you and doesn't want to answer your phone.

Other circumstances:

If when dialing, it is indicated that all numbers are in a call, but the receiver is not in a call state, it means that the telephone call function of this number is not normal at this time, and the blacklist Do Not Disturb function is probably set. At this time, the blacklist/Do Not Disturb function needs to be removed before the telephone call function is restored.

You can look at similar software on your mobile phone first, such as call manager, mobile assistant, QQ security manager, 360 optimization master and similar software that comes with your mobile phone.

Call forwarding can transfer the access number to other designated numbers, and if the transferred number is busy, there will be such a prompt. At this time, it can be solved by canceling call forwarding. Different mobile phones have different setting rules. Other cancellation methods can refer to the mobile phone manual or consult the operator's customer service.