WhozCalling the new popular App. Is a cross-platform mobile App, which allows you to effectively monitor your incoming calls and SMS, by knowing any caller's ID even if he wasn't saved in your contact list. Say Goodbye to all the unidentified numbers bothering you. And know the name of the person calling you.
WhozCalling is an easy-use free application that works on Blackberry, iPhone, Nokia and Android devices, as long as you are on 3G connection or Wifi.