To decrypt the memory card and destroy the
encryption key, select Memory card > Decrypt and
turn off encryption.
Fixed dialling
Select Menu > Communic. > Contacts > Options >
SIM contacts > Fixed dial contacts.
With the fixed dialling service, you can restrict calls
from your device to certain phone numbers. Not all SIM
cards support the fixed dialling service. Contact your
service provider for more information.
When fixed dialling is activated, calls may be possible
to the official emergency number programmed into
your device.
1. To restrict calls from your device, select Options >
New SIM contact and enter the contact name and
phone number to the list of numbers to which calls
are allowed, or select Add from Contacts to copy
the contact from Contacts. To restrict calls by a
country prefix, enter the country prefix in the list of
numbers. All phone numbers to which calls are
allowed must start with this country prefix.
2. Select Options > Activate fixed dialling. You
need your PIN2 code to activate and deactivate
fixed dialling or edit your fixed dialling contacts.
Contact your service provider if you do not have the
code. To cancel the service, select Options >
Deactivate fixed dialling.
Tip: To send text messages to the SIM contacts
while the fixed dialling service is active, you
need to add the text message centre number to
the fixed dialling list.
Certificate manager
Select Menu > Tools > Settings > General >
Security > Certificate management.
Digital certificates are used to verify the origins of
software but do not guarantee safety. There are four
different types of certificates: authority certificates,
personal certificates, trusted site certificates, and
device certificates. During a secure connection, a server
may send a server certificate to your device. Upon
receipt, it is checked through an authority certificate
stored in your device. You receive notification if the
identity of the server is not authentic or if you do not
have the correct certificate in your device.
You can download a certificate from a web site, or
receive a certificate as a message. Certificates should
be used when you connect to an online bank or a
remote server to transfer confidential information.
They should also be used if you want to reduce the risk
of viruses or other malicious software, and to check the
authenticity of software when you download and
install software to your device.
Tip: When you add a new certificate, check its
authenticity.
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Security and data management
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