Service Mode "Menu not Exist" Android 4.1.2 I am having little issue here. I have accessed the Service Mode via this no: *#197328640# 
Then i am choosing options as follow
[1] Debug Screen
[8] Phone control
[6] Network lock 
When i press option 6 for network lock i am prompted again with the same screen which shows again same option so i choose [6] Network lock again and in this menu there should be 3 things showing. However what i see is only 
"Menu not Exist" 
Press Back Key 
Current Command s 1866  
and that's it. There are options from this menu missing and i don't know why?
You need to revert back to Jellybean 4.1.1 to get the extra options under (6)NETWORK LOCK as far as I'm aware.

Like you said there should be 3 other menu options under (6)NETWORK LOCK and they should appear after reverting back to 4.1.1.

You will need the 4.1.1 firmware for your current carrier and Phone model and (Odin) to flash the firmware.

Make sure you save the original firmware first, so if anything goes wrong with the firmware flash, you can revert back to the original firmware.

Hope this helps :)