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64 Copyright © 2005 Nokia
Server certificates are used to improve security in the connection between the
phone and the gateway. The phone receives the server certificate from the service
provider before the connection is established, and its validity is checked using the
authority certificates saved in the phone. Server certificates are not saved.
Server certificates may be needed, for example, when you want to do the following:
• Connect to an online bank or another site or remote server for actions that
involve transferring confidential information.
• Decrease the risk of viruses or other malicious software and be sure of the
authenticity of software when downloading and installing software.
Important: Note that even if the use of certificates makes the risks involved
in remote connections and software installation considerably smaller, they
must be used correctly in order to benefit from increased security. The
existence of a certificate does not offer any protection by itself; the
certificate manager must contain correct, authentic, or trusted certificates
for increased security to be available. Certificates have a restricted lifetime.
If Expired certificate or Certificate not valid yet is shown even if the
certificate should be valid, check that the current date and time in your
device are correct.
Before changing any certificate settings, you must make sure that you really
trust the owner of the certificate and that the certificate really belongs to the
listed owner.
CHANGE 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 the selected certificate is
shown. For example:
• Internet—The certificate can certify e-mail and imaging servers.
• App. installation—The certificate can certify the origin of new software.
• CALL RESTRICTION (NETWORK SERVICE)
Select Menu > Settings > Call restriction.
Call restriction allows you to restrict outgoing and incoming calls
with your phone. For this function, you need the restriction
password, which you can obtain from your service provider.
Select Options, and choose one of the following:
Activate—Request the network to set call restriction on.
Cancel—Set the selected call restriction off.
Check status—Check whether the calls are blocked.
Edit restr. passw.—Change the restriction password.
Cancel all restrict.—Cancel all active call restrictions.