NET SERVICES
Security setting
You should input your handset lock code in order to continue this menu after selecting it.
The security function setting is used to protect any
unauthorized use and to restrict service in case of loss or theft. You can change your PIN (handset password, PIN1 or PIN2) used in your unit and can set or cancel the security function. This function includes Call Barring (restrict making and taking calls) as well as FDN (Fixed Dialing Number), etc. These services can changed your settings by inputting your PIN2.
SIM lock
PASSWORD 
Lock : This sets that the handset can be turned on and continued to go onto the initial screen only when the your PIN1 is inputted.
Unlock : This sets that handset can be turned on and continued onto the initial screen without inputting PIN1.
Change PIN : This is the menu displayed when SIM lock is set to Lock
and you can change your PIN1 randomly.
Change PIN2 : Changes PIN 2. Call your service provider if you wish to know the PIN2.
NET SERVICES
Handset lock
PASSWORD 
You can set your handsets to be locked when you are turned on and input wrong PINs so that the handsets cannot be used. Once handsets are locked, even if the SIM cards are replaced with others, the lock continues. However, emergency calls can be made even in the lock state of handsets. The lock code is set ‘1234’ when you buy the phone.
This function includes the following sub menus.
Unlock : This frees access to the menu and calls
Call only : This allows general calls but restricting access to the menu by inputting a password onto the handset.
Lock : This allows only emergency calls and restricts access to menus or general calls by the input of the password of the handset.
Change code : You can change your handset password randomly.
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