webworkings :
It is really dependent on the phone. Some phones don't allow for it. Now I know they can/should work on a G3 and a G4, but you only said G. Which actual version is yours?
His phone is an LG G Stylo.
Depending on the carrier, your phone might be missing a few features. I have an LG G Stylo by Boost Mobile, and it does not have MHL, Miracast, NFC, or OTG. You also cannot root the Boost Mobile variant, because you cannot access fastboot. Next time I get another one, I will get a different carrier.