When you download a new app onto your phone, that program often requests access to the information on your device. If you deny access, you might be limited in what you can do on the app, or you might not even be able to use it at all. For this reason, you should use discretion when downloading new apps. Avoid it whenever possible, and only download apps that you’ve heard of before and are popular. Otherwise, you could end up with malware on your device.