Nokia C5 User Manual page 111

Closed user group — Specify a group of people to whom you can call and who can call
you (network service).
Confirm SIM services — Set the device to display confirmation messages when you
are using a SIM card service (network service).
Manage certificates
Digital certificates protect your content when transferring confidential information.
Certificates should be used when connecting to an online bank or another site, or to a
remote server for actions that involve transferring confidential information.
Certificates should also be used when you want to reduce the risk of viruses or other
malicious software and be sure of the authenticity of software when downloading and
installing software.
Select Menu Settings
>
management and select the desired certificate type.
Digital certificates do not guarantee safety; they are used to verify the origin of software.
Important: The existence of a certificate considerably reduces risks involved in
remote connections and software installation. To benefit from increased security,
certificates must be used correctly, and they must be correct, authentic, or trusted.
Certificates have a restricted lifetime. If they are expired or invalid, check that the current
date and time in your device are correct.
Security module
The security module provides security services for different applications.
Select Menu Settings
>
and the desired security module.
View security module details
Select Options
>
Restore original settings
You may want to reset some of the settings to their original values. All active calls and
connections must be ended.
Select Menu Settings
>
the settings, you need to enter the lock code.
After resetting, the device may take a longer time to switch on. Documents and files are
unaffected.
and Phone
and Phone
Security details.
and Phone
Phone mgmt.
>
Phone mgmt.
>
Phone mgmt.
>
Settings 111
Security Certificate
> >
Security Security module
> >
Factory settings. To restore
>