User's Manual

Table Of Contents
Remove or turn o a certificate
When you remove a certificate that you installed, it is deleted from your device. If you require the certificate again, you
must reinstall it. When you turn o a system certificate, you can turn it on again.
1. Swipe down from the top of the screen once using two
fingers, or twice using one finger.
2.
Tap > Security > Trusted credentials.
3. Do one of the following:
To view a list of installed
certificates, tap the User tab.
To view a list of system
certificates, tap the System tab.
4. Tap a certificate.
5. Do one of the following:
To remove an installed
certificate, tap Remove.
To turn
o a system certificate, tap Disable.
To turn on a certificate that you turned o, on the System tab, tap the certificate. On the bottom of the certificate
information screen, tap Enable.
Turn o access to the usage info for apps
Some apps and services monitor the active apps on your device. If you turn o access to this info, some apps might not
work correctly.
1. Swipe down from the top of the screen once using two fingers, or twice using one finger.
2.
Tap > Security > Apps with usage access.
3. Tap an app to turn o the switch.
To turn on access, tap the app again.
Improving your security settings using DTEK by
BlackBerry
The DTEK by BlackBerry app is designed to help you monitor and control the level of security on your BlackBerry device.
The DTEK by BlackBerry app is preloaded on your device, and updates are available from the Google Play
store.
User Guide
BlackBerry Strictly Confidential
Security
120