Recieving calls system \"I am available\"

How many times has an inopportune call bothered us? Driving, at work, in a meeting ... And only because the phone rings we have become nervous.

Well, the idea is that smartphones of all brands include a system in which you put your schedules in which you would like to receive calls, so that anyone who wants to call you knows what times you would like to receive calls.

You can put your schedules that suit you best or activate to deactivate this function based on your day to day.

It should also make an option so that people who want to make a call to you, in addition to knowing if you are available can make an \"emergency\" call in which even if you do not have that schedule they can call you.

Functions :

Add call schedule.

Activate or deactivate receiving calls 

Receive emergency calls

Receive calls \u201calways \" from my most common contacts (family friends)

Receive calls only in my established schedule.

In the case of the smartphone of the one who wants to call you appears:

Schedule 

Notify me when it is time to call

Depending on whether they can make emergency calls to you, emergency call button

This should be implemented by all smartphone manufacturers (which are not many) at the same time through a system update so that both the one who is going to call and the one receiving the call have the necessary data about availability.

This broadly speaking is what it would be ...