Settings
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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.