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Installing a digital certificate
Use client and Certificate Authority (CA) digital certificates to enable HTC Desire 820
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.
§ 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.
1. Save the certificate file in the root folder on HTC Desire 820.
2. Go to Settings, and then tap Security.
3. Tap Install from 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 tap OK.
Disabling an app
Apps, even if not used often, may be running in the background and downloading
data. If an app cannot be uninstalled, you can disable it.
1. Go to Settings, and then tap Apps.
2. Swipe to the All tab.
3. Tap the app, and then tap Disable.
Assigning a PIN to a nano SIM card
You can help to protect the nano SIM card by assigning a Personal Identification
Number (PIN).
Make sure you have the default PIN provided by your mobile operator before
continuing.
1. Go to Settings, and then tap Security.
2. Select which card you want to assign a new PIN to.
3. Choose to lock the card, enter the default PIN of the card, and then tap OK.
4. To change the card PIN, tap Change SIM PIN.
169 Settings and security
169


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