[Q] How to remove LTE setting. topic

Hey!
I got big problem with my F180K (korean version LGOG). On original rom there isn't any setting for 3G ONLY, or another. I want to delete LTE setting from phone. I just dont wanna use LTE... BUT: I can't use 3G too... Every 2 - 5 minutes smartphone looks for LTE signal. When its looking for LTE i dont have signal on my phone. I WANT HAVE ONLY 3G!
Is there any setting inside the phone which i could delete and "tell" him that he MUSTNT look for LTE and use !ONLY! 3G?
Reply asap please.

Thanks