Nokia E51

Page 101
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long and is case-sensitive. The password is stored in your
device. You do not need to enter it again while you use the
memory card on the same device. If you use the memory
card on another device, you are asked for the password.
Not all memory cards support password protection.
To remove the memory card password, select 
Options
 >
Remove password
. When you remove the password, the
data on the memory card is not protected against
unauthorised use.
To open a locked memory card, select 
Options
 > 
Unlock
memory card
. Enter the password.
If you cannot recall the password to unlock a locked
memory card, you may reformat the card, in which case
the card is unlocked and password removed. Formatting
a memory card destroys all data stored on the card.
Fixed dialling
Select 
Menu
 > 
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.
Download a certificate from a web site, or receive a
certificate as an e-mail attachment, or as a message sent
through a Bluetooth or infrared connection. 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
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