User Guide

Settings 191
1. Slide the Notifications panel open, and then touch > Security.
2. Select the Unknown sources option.
Important: After installing the app, go back to Settings > Security and make sure to clear
the Unknown sources option. This can help protect your phone from installing
other insecure apps from the Web.
Work with Certificates
Use client and Certificate Authority (CA) digital certificates to 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: Some apps such as your browser or email client let you install certificates directly in the
app. See the app’s help for details.
Install a Digital Certificate
Note: You must set a lock screen PIN or password before installing a digital certificate.
1. Save the certificate file in the root folder on your phone.
2. Slide the Notifications panel open, and then touch > Security.
3. Touch Install from phone storage.
4. If you have more than one certificate in the root folder, select the certificate you want to
install.
5. Enter a name for the certificate and touch OK.
Accessibility Settings
Use these settings when you’ve downloaded and installed an accessibility tool, such as a
screen reader that provides voice feedback. You can turn accessibility functions or services on
or off.
1. Slide the Notifications panel open, and then touch .
2. Touch Accessibility and choose the settings you want. Options include:
 TalkBack: Turn this option on if you want your phone to provide spoken feedback.
TalkBack helps blind and low-vision users.
 Font size: Touch this option to select a font size for better readability.
 Power button ends call: When selected, you can press the Power button to end a
call.