Download for free on Android Market from your phone!
Have you ever wanted to know who is calling you before answering? Now you can! Supported in over 30 countries and over 50 different devices.
TrueCaller runs in the background of your phone and when you receieve a phone call from a number which is not saved in the contacts TrueCaller makes a reverse phone number lookup and then displays the caller in your phone.
TrueCaller uses less than a 1 KB of your data traffic on each lookup.