Nokia C5 User Manual

Also see for C5: User guide Getting to know

Contents

Closed user group — Specify a group of people to whom you can call and who can callyou (network service).Confirm SIM services — Set the device to display confirmation messages when youare using a SIM card service (network service).Manage certificatesDigital certificates protect your content when transferring confidential information.Certificates should be used when connecting to an online bank or another site, or to aremote server for actions that involve transferring confidential information.Certificates should also be used when you want to reduce the risk of viruses or othermalicious software and be sure of the authenticity of software when downloading andinstalling software.Select Menu > Settings and Phone > Phone mgmt. > Security > Certificatemanagement 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 inremote 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 currentdate and time in your device are correct.Security moduleThe security module provides security services for different applications.Select Menu > Settings and Phone > Phone mgmt. > Security > Security moduleand the desired security module.View security module detailsSelect Options > Security details.Restore original settingsYou may want to reset some of the settings to their original values. All active calls andconnections must be ended.Select Menu > Settings and Phone > Phone mgmt. > Factory settings. To restorethe settings, you need to enter the lock code.After resetting, the device may take a longer time to switch on. Documents and files areunaffected.Settings 111