With the continuous improvement of communication system, a burning question has been arisen. The security of data is the prime concern of this modern world. Nowadays, a small android device is enough to lead a smooth life due to the advancement of information technology. E-commerce, entertainment, E-market and so on can be dealt with an android handset. As we store all our personal important data in this device so the security should be maximum. We have created an app, “Android Defender” to serve this purpose. All the existing security system run through online system. But this app is totally offline and sms based. It will help the user to track the location of lost device. Android Defender will play the role to find the android device in case of hurry. It can be helpful to find a lost device instantly. All these services can be done with the help of any type of cellular device. The other salient features are wiping data, disable camera, screen lock etc.