Easy ways to make your Android device more secure - TechRepublic. Cross platform syncing means that your phone contains as much confidential client data as your notebook or desktop computer. And, since you carry it around all day, misplacing it or having it stolen are also risks. How should you protect the data stored on it? This article suggests some methods. The first I recommend is that you encrypt the contents. Second, use a lock down screen that activates 15 seconds after non use of the phone. Use a PIN, or a password, or a fingerprint; just use something. Third, don't ever allow someone else to use the phone, unless you are present the whole time. These are minimal steps. Read the article for more. Be careful out there.