Truecaller is a mobile application that can be used to block spam and malicious calls. True caller can be easily downloaded from playstore following several steps. True caller has a large Database with phone numbers and tends to identify spam calls , the identified phone numbers are made available to truecaller android application users. Users of the application can block the blacklisted phone numbers on the application. True caller has got a call log or history and one can easily see when the caller was lastly seen on the app. You can easily add newly identified number from your Truecaller app to your native mobile / call phone phonebook.

To Download And Install "Truecaller: Caller ID, spam blocking & call record" On mobile / cell phone or any other android device from Google playstore Follow The Following Steps :

Step 1. Tap the "Play Store" icon.
Step 2. Inside Google Play Store, type, "Truecaller" 
Step 3. Into the search box and tap the first result that populates.
Step 4. On the Truecaller app page, tap the green "INSTALL" button.
Step 5. On permission page Scroll through and tap, "ACCEPT".
Step 6. Now True caller will install on your device, this may take sometime but if you're in a fast connection its just a second, When the app installation is complete, tap the green "OPEN" button.
Step 7. After you review both the Privacy Policy and the Terms of Service., tap "GET STARTED".
Step 8. Choose either to register a new account or sign in with Google or Facebook.
Step 9. Truecaller will now attempt to verify your phone number. Do so.(enter your mobile number and in the text field and click the appropriate button).
Step 10. After successful phone number verification you will see this message. "Success let's continue".
Step 11. Now You Have Installed truecaller.
Direct video tutorial link can be found here - https://www.youtube.com/watch?v=Jmp8CPWCwWo