How to set all the calls that can't be called in but can be reminded by SMS?

First, call forwarding is enabled, then the call manager or Unicom secretary is enabled, and finally all calls are transferred to the call manager or Unicom secretary.

The so-called call forwarding, also known as call forwarding and call forwarding, generally refers to a function that can be set to transfer calls to other mobile phones when the phone user does not want to answer, is inconvenient to answer, or cannot answer the phone because the phone is out of power or faulty.

Obviously, the original intention of caller ID design is to provide convenience for users, so that users can decide whether to answer the phone or how to answer the phone at any time according to their own wishes.

There are several types of mobile phone call forwarding:

1, unconditional transfer: once set, all calls to you will be transferred to your pre-designated phone, and your mobile phone can't answer calls for the time being, so you can only answer them from your pre-designated number.

2. Busy Transfer: Once set, when you are talking to other users, if someone calls you, the call will be automatically transferred to your preset number.

3. No answer transfer: Once set, when your mobile phone rings and no one answers, all users who call you will be transferred to your preset number.

4. Unavailable (no signal or no signal) transfer: Once set, when your mobile phone is turned off or no signal, all calls made to you will be transferred to the phone or mobile phone with your pre-specified number.

The above transfer types are applicable to different situations. You can set three types: Busy Transfer, No Answer Transfer and Cannot Connect Transfer separately or simultaneously as required. When you set Unconditional Transfer, the other three settings are invalid.