As per the sources we have got a hint that LG is going to provide Android 6.0 Marshmallow update to LG G4 and some variants of LG G3 variants. It is notified that LG may skip Android 5.1.1 update to both of the devices.
Amid of the Motorola’s Marshmallow update plans and HTC’s also here we have got to know about some plans from LG side. LG is going to provide Marshmallow to LG G4 and some variants of LG G3 as per the South Korean company’s official Korean support site.
We have got some pieces of information regarding the update for both devices. In the image below you can see an option to get support for which Android version.
Considering LG V10, it already runs on Android 6.0 Marshmallow out of box.