Default LG Lucid 2 unlock

hello, I'm from Georgia, not state, country. I bought LG lucid 2 and in my country there are only GSM operators. I rooted My device and than edit build.prop file somehow, and suddenly dissapear that Open testing mode opened and I could set preffered network type: but I couldn't set on GSM only mode, it swithes itself on GSM/CDMA auto (PRL) mode, or LTE mode, or anything where is CDMA or LTE listed. please help me someone, I am new on android platform and even don't know what is radio which is on (turn off radio).