Client and Certificate Authority (CA) digital certificates enable your phone to access VPN or secured Wi-FI networks, and also to provide authentication to online secure servers. You can get a certificate from your system administrator or download it from sites that require authentication.

NOTE: You must set a lock screen PIN or password before installing a digital certificate. Some apps such as your browser or email client let you install certificates directly in the app. See the app's help for details.

 Follow these steps to install a digital certificate:

1. Save the certificate file in the root folder of your phone.
2. Navigate to Settings > Security > Install from storage.
3. If you have more than one certificate in the root folder, select the certificate you want to install.
4. Enter a name for the certificate and tap OK.