I'm with Samsung Z240E (Orange operator) is only showing "PHONE FREEZE SIM UNAVAILABLE" I tried to unlock and still giving this message. My use N-BOX+HWK.
Friends you did not understand, it will not give me option to enter the codes, even typing the code it does nothing it does not show the numbers as you type. I'll send the image of the device for you to see how it goes when you put your SIM. YES I have made with all day and did not appear to request the code is only so in the image below.
by entre 69709031 and press send button ( i know not show nember in screen but do this)
------------------------------------
or entre whithout sim this code