TrueCaller is an app for Windows Mobile and Android that’ll do quite a few interesting things. It can display the name and address of an unknown caller when possible, although it appears that the UK isn’t supported yet. The app will also update Twitter with your call status like this too.
Other features SMS pop-ups, blocking incoming calls from unwanted callers, reporting spam callers, displaying the addres of a caller on a map and more. Click on to see a video of it action.
Link – truecaller.com