This LG G3 Keyboard Theme for LGG2 and Other LG Home based LG Devices where Keyboard Themes are supported.

Please Check if your Keyboard supports theme before purchase

Installation Instructions:
1-Download and install the theme
2-System setting -> Language & Input -> LG Keyboard -> Additional settings -> Keyboard Theme ->Select then Installed theme

If your LG Phone supports Keyboard theme (Like LGG2 and Other LGHome based Phones) you're good to go.