So, You have rooted your OnePlus 3T and now want to use the "Google Assistant" that everyone is talking about. This article will help you enable the google assistant on your phone. Requirements : Rooted OnePlus 3T running Android 6+(Marshmallow or higher) STEPS: 1. Language Settings : Change your device's language to English(US) Or English(UK). To do so, navigate to Device Settings > Language & Input > Change it...