How to keep your Android phone safe
To keep your device is as safe and secure as possible, be sure to use common sense with your device—don’t leave your phone in public places unattended or give it to people you don’t trust—but also use these suggested Android features. Along the way you’ll see links to Google resources and additional information.
Note: Not all Android devices have settings in the same place, so if you don’t see the exact wording, look for something similar. You can also follow the links to your manufacturer’s support site to learn how to navigate your device’s settings.
4 things you can do immediately
Set a screen lock
Secure your device by setting a screen lock with a PIN, password, or pattern. Each time you turn on your device or wake up the screen, you’ll be asked to unlock your device. Go to Settings → Security → Screen security → Screen lock.
You can also choose to have your device automatically unlock when you have it with you using using Smart Lock for Android.
Make sure your data is backed up
Backups make it easier to recover your information and apps if your device is lost, stolen, or damaged. You can learn how to back up data such as your photos, wifi passwords, and music here, or find an app to back up those things here.
Encrypt your device
Encryption helps keep your data safe if you lose your device. Nexus 6 and Nexus 9 devices are encrypted by default. If your Android device is running Jelly Bean (Android 4.1) or higher, you can encrypt the data on your device in Settings → Security → Encryption.
Turn on 2-factor authentication for your Google account
This protects your account with both a password and a code from your phone. This extra layer of protection on top of your password protects you in case someone has your password. If you need some help setting it up, Greenbot’s got a how-to readily available.