Settings124• Lock if SIM card chan...: You can set your phone to askfor the lock code when an unknown USIM/SIM card isinserted into the phone. The phone maintains a list ofUSIM/SIM cards that are recognised as the owner’s cards.• Closed user group (network service): You can specify agroup of people whom you can call and who can call you.For more information, contact your service provider. SelectDefault to activate the default group agreed on with theservice provider or On to use another group (you need toknow the group index number).Note: When calls are limited to Closed user groups, calls maybe possible to certain emergency numbers in somenetworks (e.g., 112 or other official emergencynumbers).• Confirm SIM services (network service): You can set thephone to display confirmation messages when you areusing a USIM/SIM card service.Important: Even if the use of certificates makes the risksinvolved in remote connections and software installationconsiderably smaller, they must be used correctly in order for youto benefit from increased security. The existence of a certificatedoes not offer any protection by itself; the certificate managermust contain correct, authentic, or trusted certificates forincreased security to be available.Certificate managementDigital certificates are used to verify the origin of browserpages and installed digital certificates are needed if you:• want to connect to an online bank or another site or remoteserver for actions that involve transferring confidentialinformation, or
