You can set the phone to ask for the security code when a new SIM card is inserted
in the phone (option
(“A new SIM card” means here a card that is not one of the five cards used most
recently with the phone.)
To enter this function you need the security code.
Note that when you change this setting, all the recent calls lists in Menus 4-1 to
4-3 are cleared.
Switching the phone on or off
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