Secure Your Mobile Device
To prevent thieves from gaining access to your personal information, make sure that your mobile device is protected.
Use a strong PIN (or passcode) with at least 6 digits.
Encrypt your files.
Set the screen lock on your device to activate immediately when it's not in use.
Make sure your OS version is supported by the vendor.
iOS
To set up a passcode, follow the instructions outlined on Apple Support’s Use a Passcode with Your iPhone, iPad, or iPod Touch support web page.
Once you've set a strong passcode, your device will be encrypted by default.
Android
Newer Android devices are encrypted by default once you pick a pattern, numbered PIN, or mixed password for your lock screen. To set up a passcode, follow the instructions outlined on Google’s Set Screen Lock on an Android Device support web page.