User Guide
Page 112
...PUK code up to avoid unauthorized use of calls. You will lock out. If you want to When SIM changed, your phone will request security code if you set phone lock to change the setting, you can view the following submenus. Auto key lock When Auto key Lock feature is enabled..., the phone is blocked, you will need to enter PIN code when you switch on the phone, the phone will request security code only when you switch on the phone. 4. You can not unlock your SIM card. This function requires the call barring password.
...PUK code up to avoid unauthorized use of calls. You will lock out. If you want to When SIM changed, your phone will request security code if you set phone lock to change the setting, you can view the following submenus. Auto key lock When Auto key Lock feature is enabled..., the phone is blocked, you will need to enter PIN code when you switch on the phone, the phone will request security code only when you switch on the phone. 4. You can not unlock your SIM card. This function requires the call barring password.