The .mobile.cshtml is included out of the box, but you can also define other specific display modes with a lambda expression: DisplayModeProvider.Instance.Mode

The .mobile.cshtml is included out of the box, but you can also define other specific display modes with a lambda expression: DisplayModeProvider.Instance.Modes.Insert(0, new DefaultDisplayMode("iPhone") { ContextCondition = (context => context.GetOverriddenUserAgent().IndexOf ("iPhone", StringComparison.OrdinalIgnoreCase) >= 0) }); After calling that, you can create a view (index.iphone.cshtml) and it'll be automatically picked up when the condition's matched. This example uses the user agent, but you can use any logic you'd like - cookie / database call / time of day / whatever.