How to make a calling app in android

How to make a calling app in android
In this tutorial, we are going to learn how to make calling android app using MIT app inventor. In this tutorial, we are going to use the calling component and button for call action. First, we took one layout Then we drag and drop the calling component from share options Then drag and drop the button. Now We need to write some simple code. Go to block option and then click on the button and choose the action when someone clicks on the button then choose the make a call option from the calling component and drag and drop these option and then go to design option and click on calling component and put the number in calling component properties and now your app is ready to make a call. If you have any doubt you can ask me on the comment.
via YouTube https://youtu.be/8VHRLWDmaHo