Android (Including Oculus Go)

On Android you must request permission to use the microphone, see the Unity documentation for this here. If you use Android 6.0 or greater and API level 23 or greater there is a runtime permissions system which Unity does not support. However there is some excellent documentation by Oculus on how to build a plugin to request permissions here.

ARM64

DeLimit includes ARM64 binaries compatible with Android, these are only enabled in Unity 2018.1+ (Unity 2017.4 does not support ARM64).