Security
Select
Phone and SIM card
,
Certificate management
, or
Security module
.
Phone and SIM card
You can change the following codes: lock code, PIN or UPIN code, and PIN2 code.
These codes can only include the numbers from 0 to 9.
Avoid using access codes similar to emergency numbers to prevent accidental
dialing of the emergency number.
Code in use
— to select the active code,
PIN
or
UPIN
, for the active USIM. This is
shown only if the active USIM supports UPIN, and the UPIN is not rejected.
PIN code request
or
UPIN code request
— to set the device to request the code
each time the device is switched on. Some SIM cards may not allow the PIN code
request to be turned
Off
. If you select
Code in use
>
UPIN
,
UPIN code request
is
shown instead.
PIN code
or
UPIN code
,
PIN2 code
, and
Lock code
— to change the codes
Keypad autolock period
>
User defined
— to automatically lock the keypad after a
defined period of inactivity
Phone autolock period
— to set a time-out after which the device is automatically
locked. To use the device again, you need to enter the correct lock code. To turn off
the autolock period, select
None
.
Lock if SIM card changed
— to set the device to prompt for the lock code when an
unknown, new SIM card is inserted into your device. The device keeps a list of SIM
cards that are recognized as the owner cards.
Closed user group
(network service) — to specify a group of people whom you can
call and who can call you. For more information, contact your service provider. To
activate the default group agreed on with the service provider, select
Default
. If
75
you want to use another group (you need to know the group index number), select
On
.
When calls are limited to closed user groups, calls may be possible to the official emergency
number programmed into your device.
Confirm SIM services
(network service) — to set the device to display confirmation
messages when you use a SIM card service
Certificate management
A list of authority certificates that have been stored in your device is displayed in
Certificate management
. To see a list of personal certificates if available,
scroll right.
Digital certificates should be used if you want to connect to an online bank or
another site or remote server for actions that involve transferring confidential
information. They should also be used if 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.
When security features that restrict calls are in use (such as call barring, closed user group,
and fixed dialing), calls may be possible to the official emergency number programmed into
your device.
Important: 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.
View certificate details and check authenticity
You can only be sure of the correct identity of a server when the signature and the
period of validity of a server certificate have been checked.
The device notifies you if the identity of the server is not authentic or if you do not
have the correct security certificate in your device.
To check certificate details, scroll to a certificate, and select
Options
>
Certificate
details
. While opening the certificate details, the device checks the validity of the
certificate and one of the following notes may appear:
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Expired certificate
— The validity period has ended for the selected certificate.
Certificate not valid yet
— The validity period has not yet begun for the selected
certificate.
Certificate corrupted
— The certificate cannot be used. Contact the certificate
issuer.
Certificate not trusted
— You have not set any application to use the certificate.
Change the trust settings
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.
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.
Security module
View or edit security modules.