With the release of new smartphones continuously in the world market, the temptation for buying smartphones is growing day by day.Especially the techies who are always eager to try a new device with a new technology. If a pile of old smartphones is increasing in your inventory of smartphones and it is becoming very difficult for you to figure out what to do with it, then here are some of the things which you can do with your old smartphones. Surveillance Camera : Your old smartphone can serve you well especially in case of security-related issues . If you want to monitor your house when you are not in your home, then, in this case, your old smartphone can act as a CCTV camera for your house.There are many apps in the google play store which can be downloaded and used on your smartphone. Digital Photo Frame: If you are a big fan of keeping photo albums on your home and does not want to overpopulate your room with your photos than the best opti...