Facebook now takes a big step in helping its users by introducing a new app called "Hello".
It is an Android app which uses data from Facebook to show who is calling. This app will act as a tool to identify the caller id and if needed can block the caller if that is not in your Facebook contacts.
Simply it counter-checks the callers' details from your Facebook contacts and displays the same for you to decide whether it is a genuine or a fake call. The user has the right to block that number if it is unknown.
This feature is applicable to those who have shared their numbers in Facebook.
Currently, Facebook is testing this app in US , Brazil and Nigeria.
This app will be available in Google Play store once tested for Android users.