How to activate 4G (LTE) on LG G3

"NOTE" I am not responsible for any damage you may make to your phone!

How to activate 4G (LTE)  on LG G3:
Enter the following on your device in dialer:
3845#*855# (for International model)

Now you should see a hidden menu.
Take the follow steps:
1. Go to LTE-Only
2. Go to Modem Settings
3. Go to RAT Selection
4. Select GSM / WCDMA / LTE auto or what ever selection you want

Now telephone should search and join the 4G (LTE) network if available from your carrier in the area.

Job done...