How To Download And Install Truecaller On Android Mobile Phone:
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 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 -