How to enter unfreeze codes in Samsung phones

How to enter unfreeze codes in

    If someone has entered too many incorrect codes or tried incorrectly to software-unlock a phone, the following messages will be displayed on the screen when any SIM card is inserted: “phone freeze”, “SIM unavailable”, “return for service” or, on some Galaxy models will display, “network unlock unsuccessful” when entering unlock codes. This means the unlock counter will need to be reset by using an unfreeze code (MCK code).

    Below is the method used to enter MCK codes into Samsung phones:
        Insert an Unauthorized Sim Card and turn ON your phone so it displays "Phone Freeze”, “SIM unavailable”, “Please contact service provider", etc.
        Type the unfreeze code we sent you into the keypad (Note:no digits will appear on the screen while typing this). Press ok, confirm or press the phone’s center key when finished typing code.
        The phone should now be requesting the unlock code (NCK code); enter this to finish the unfreeze and unlock process of your phone. If “phone freeze” or similar message has disappeared but the phone is not requesting the unlock code (NCK code) please check the FAQ section on entering Samsung unlock codes to find the correct method for your phone.