Android phone manager or we can say Android device manager, this is a very awesome feature given by the google for its android phones. We can you this when our phone misplace, or theft. This is accessible through website (https://www.google.com/android/devicemanager), we can track our phone as it gives correct location of mobile phone. If our phone is misplace by us then we can ring our phone from the website (even our phone is on silent, phone rings at high volume). We can erase our important data easily if our device is theft. Overall, this feature helps us a lot but there is one problem with this feature, we have to open the internet connection in our device (either it is by wifi or packet data). Without, internet connection, this feature is not working. So, I found that it is a loop hole in this feature.