Copyright © 2004 Nokia. All rights reserved. 119Important: Even if the use of certificates makes the risks involved in remoteconnections and software installation considerably smaller, they must be usedcorrectly in order to benefit from increased security. The existence of a certificatedoes not offer any protection by itself; the certificate manager must containcorrect, authentic, or trusted certificates for increased security to be available.Important: Certificates have a restricted lifetime. If Expired certificate orCertificate not valid yet is shown even if the certificate should be valid, check thatthe current date and time in your phone are correct.Changing the trust settings of an authority certificate• Scroll to an authority certificate and select Options→ Trust settings.Depending on the certificate, a list of the applications that can use theselected certificate is shown. For example:Application manager / Yes - the certificate is able to certify the origin of newsoftware.Internet / Yes - the certificate is able to certify e-mail and imaging servers.Important: Before changing these settings, you must make sure that youreally trust the owner of the certificate and that the certificate really belongs tothe listed owner.Call barring (network service)Call barring allows you to restrict the making and receiving of calls withyour phone. For this function, you need the barring password, which youcan obtain from your service provider.
