PIN code entries, the code is blocked, and you need to use thePUK code to unblock it before you can use the SIM card again.To set the keypad to lock automatically after a defined period,select Phone and SIM card > Keypad autolock period.To set a time-out after which the device is automaticallylocked and can be used only if the correct lock code is entered,select Phone and SIM card > Phone autolock period. Entera number for the time-out in minutes, or select None to setoff the autolock period. When the device is locked, you canstill answer incoming calls, and calls may still be possible tothe official emergency number programmed into yourdevice.To set a new lock code, select Phone and SIM card > Lockcode. The preset lock code is 12345. Enter the current codeand then the new code twice. The new code can be 4-255characters long. Both alphabets and digits can be used, andboth uppercase and lowercase alphabets are possible. Thedevice notifies you if the lock code is not properly formatted.Restore original settingsTo select a positioning server, select Positioning server.To select which measurement system you want to use forspeeds and distances, select Notation preferences >Measurement system.To define in which format the coordinate information isdisplayed in your device, select Notation preferences >Coordinate format.E-mail key settingsSelect Menu > Ctrl. panel > Settings and General.To select which mailbox to open with the e-mail key, selectE-mail key settings > E-mail key, and press the scroll key.Telephone settingsSelect Menu > Ctrl. panel > Settings and Phone.Call settings