Facebook Creative Labs has launched Hello for Android, another Caller ID application that reveals to you who's calling you, regardless of the fact that you have not saved the individual's number in your phone.The application likewise lets you block undesirable calls that go straight to voicemail, which can be evaluated in your recent calls. This straightforwardly rivals Truecaller that offers the same guest ID and blocking features. Since the Hello application has Facebook integration, it offers most recent information about your contacts and gives you a chance to search for individuals and organizations on Facebook and call them easily.
Features of Facebook Hello

See who’s calling you, even if you don’t have that phone number saved in your phone.
Easily block unwanted calls.
Automatically block calls from numbers that have been blocked by a lot of other people.
Search your phone contacts and people and places on Facebook, without switching between apps.
Always have the latest info about your contacts, including their profile pictures and birthdays.
Open a Facebook profile or Page with just one tap.
Call, add and edit contacts — just like you do on your phone
Call and text for free with Messenger.
The Facebook Hello Dialler and Caller ID App is currently available through Google Play in the US, Brazil, and Nigeria, but you can side-load the APK manually if you want to try it out immediately before it rolls out globally in coming months.

Source: http://techstix.com/blog/facebook-hello-dialler-and-caller-id-app-launched/

Nice app

martfrank:
Facebook Creative Labs has launched Hello for Android, another Caller ID application that reveals to you who's calling you, regardless of the fact that you have not saved the individual's number in your phone.The application likewise lets you block undesirable calls that go straight to voicemail, which can be evaluated in your recent calls. This straightforwardly rivals Truecaller that offers the same guest ID and blocking features. Since the Hello application has Facebook integration, it offers most recent information about your contacts and gives you a chance to search for individuals and organizations on Facebook and call them easily.
Features of Facebook Hello

See who’s calling you, even if you don’t have that phone number saved in your phone.
Easily block unwanted calls.
Automatically block calls from numbers that have been blocked by a lot of other people.
Search your phone contacts and people and places on Facebook, without switching between apps.
Always have the latest info about your contacts, including their profile pictures and birthdays.
Open a Facebook profile or Page with just one tap.
Call, add and edit contacts — just like you do on your phone
Call and text for free with Messenger.
The Facebook Hello Dialler and Caller ID App is currently available through Google Play in the US, Brazil, and Nigeria, but you can side-load the APK manually if you want to try it out immediately before it rolls out globally in coming months.

Source: http://techstix.com/blog/facebook-hello-dialler-and-caller-id-app-launched/

All these applications don't work in Nigeria

vodacom:

All these applications don't work in Nigeria

Have you tried some of them?