Unhappy LG G2's unlock network menu won't appear! Help!

Well, I searched for this issue with LG G2 and did not find anything that could help me.
To make it fast, when changing the sim to another from another carrier, the window asking for a code won't pop up....
There's another way in wich you introduce a number on the dial screen and a menu pops up... that won't work either....
Nor the two methods where you dial some numbers and it asks you for the code... so...

Do I have to go back to stock??

I am running on CloudyPro 2.1
Thank you.