What is an Uncovered Call?

Call forwarding means that your call cannot be answered or you are unwilling to answer the call, and you can forward the call to another phone number. It is a traditional communication service in the telecommunications industry, also known as call forwarding and incoming transfer.

The so-called call transfer, also known as pre-call transfer, incoming transfer, generally refers to when the phone user does not want to answer, inconvenient to answer or when the phone is out of power or failure to answer the call, you can set the call to another phone On a feature.

Obviously, the original intention of the caller ID design is indeed to provide convenience to the user, so that the user can decide at any time whether to answer the call or how to answer the call. ^[1]

There are several types of call forwarding for mobile phones:

1. Unconditional transfer: Once set, all calls to you will be transferred to your pre-designated phone, your mobile phone will no longer ring, you can only answer from the pre-designated phone.

2. Transfer on busy: Once set, when you are using the mobile phone to call, if other people call you, the incoming call will be automatically transferred to your pre-designated phone or mobile phone.

3. No answer transfer: Once set, when your mobile phone is ringing and no one answers, all calls to you will be transferred to the phone or mobile phone of your pre-designated number.

4. Unreachable (no signal or shutdown) transfer: Once set, when your mobile phone is turned off or no signal, all calls to you will be transferred to the phone or mobile phone of your pre-designated number.

The above types of transfers are suitable for different situations. You can set three types of transfers: "busy transfer", "no answer transfer", and "inaccessible transfer" according to your needs. When you set "Unconditional Transfer", the other three settings are invalid. ^[2]

With the development of the Internet, there are certain problems with telephone call transfer. This problem is either used by criminals or the program itself is facing.

1. When the coverage area is unreachable

It is well known that mobile phones can be used for mobile communication to exchange data in real time. However, the prerequisite for mobile communication is that the user must be within the network coverage area of his network operator. Sometimes the cell phone is in the basement or high-rise building, and the cell phone will "leave" the coverage area because it cannot find the network. After the mobile phone leaves the coverage area, in general, the mobile phone cannot make or receive calls. At the same time, the phone is still desperately searching for signals at this time, which will cause the battery to drain too quickly. At this time, we should use the call forwarding function to transfer it to a fixed telephone so that incoming calls will not be lost.

2. Holidays and rest days

Everyone knows that it is also necessary to pay for answering the electricity with a mobile phone, and the use of the call transfer function is completely transparent to the dialing user, that is, he does not even feel that his phone has been transferred to the fixed phone. Therefore, when we are on holiday or rest day, we can use the call transfer function of the mobile phone to transfer the mobile phone call to the wired phone at home. In this way, you can save electricity (the battery of mobile phones has a certain life and time limit, and: in general, the battery of a mobile phone can be much more expensive than the battery in a torch). Second, it can save costs (such as Gold Card Express users for 0.10 yuan / Minute, and normal answering needs 0.60 yuan / minute) can reduce radiation (currently there are many people caused headaches due to mobile phones), why not? ^[3]