Nokia 3250

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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
 /
Lock code
— to change the codes
Autolock period
— to set a time-out after which the phone is 
automatically locked. To use the phone again, you need to enter the 
correct lock code. To turn off the autolock period, select 
None
.
Lock if SIM changed
— to set the phone to prompt for the lock code 
when an unknown, new SIM card is inserted into your phone. The phone 
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 network operator or service provider. To activate the default group 
agreed on with the network operator, select 
Default
. If you want to use 
another group (you need to know the group index number), select 
On
.
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.
Confirm SIM services
 (network service) — to set the phone to display 
confirmation messages when you use a SIM card service
Certificate management
Digital certificates do not guarantee safety: they are used to verify the 
origins of software.
To view a list of authority certificates that have been stored in your 
phone, select 
Menu
> 
Tools
> 
Settings
> 
Security
> 
Certif. 
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.
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