To set up HoloLens, you'll need to connect to a Wi-Fi network—the setup tutorial will show you how. After your HoloLens is set up, you can use it without a Wi-Fi connection, with some limits.
Without Wi-Fi, your device can't automatically detect your space. To manually load a space your HoloLens already knows, go to Settings > System > Spaces, select the space you want, and then select Load space.
In spaces your HoloLens doesn't already know, your device works in limited mode. When HoloLens is in this mode, you won't be able to place holograms—they'll stay locked to your gaze.
Apps that use Internet connections may have limited capabilities when you use HoloLens offline.