Nokia 3250 User Guide - Page 95

Tools 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. 95