Before you start hacking or messing around with any device along with the LG G6 you first need to make sure you know which version of the device you own. the best way to figure this out is to go into settings on your phone then look under about phone. i would make sure you write down all that info on model build number baseband and so on.
Now that you know what device have its time to learn the basics.
How to factory reset the devices
How to Firmware Restore the phone
Once you have these 2 skills under your belt you are ready to start rooting and hacking that phone and turn it into the monster you have always wanted.
check out my videos below I think they will really help. 🙂