Use the Security settings to configure how to help secure your phone and its data. Tap Security to access the following settings:
ENCRYPTION
Encrypt device: Opens a screen that allows you to encrypt the device to keep it secure. After encryption, a PIN or password needs to be entered each time you power the phone on.
Enable Storage Encryption: Opens a screen that enables storage encryption and synchronization with previously encrypted data.
SIM CARD LOCK
Set up SIM card lock: Opens a screen to set if you want to require a PIN to be able to access the SIM card. And, if set, allows you to change the PIN.
PASSWORDS
Password typing visible: Checkmark to briefly show each character of the password as you type so that you can see what you enter.
DEVICE ADMINISTRATION
Device administrators: Opens a page to view and/or deactivate device administrators.
Unknown sources: Checkmark to allow installation of non-Play Store applications.
CREDENTIAL STORAGE
Trusted credentials: Opens a screen to allow applications to access your phone’s encrypted store of secure certificates, related passwords and other credentials. The screen has a System tab and a User tab. Credential storage is used to establish some kinds of VPN and Wi-Fi connections. This setting is dimmed if you have not set a password to secure your credential storage.
Install from storage: Opens a screen to install a secure certificate from your phone’s internal memory.
Clear credentials: Opens a screen to delete all secure certificates and related credentials and erase the secure storage’s own password. You are prompted to confirm you want to clear this data.