---
title: enableFallback
framework: networkextension
role: symbol
role_heading: Instance Property
path: networkextension/nevpnprotocolikev2/enablefallback
---

# enableFallback

A property to enable the use of cellular data when Wi-Fi connectivity is poor.

## Declaration

```swift
var enableFallback: Bool { get set }
```

## Discussion

Discussion Wi-Fi Assist allows connections for foreground apps to switch over to cellular data when Wi-Fi connectivity is poor. When this value is true, the device brings up a tunnel over celluar to carry traffic that’s eligible for Wi-Fi Assist and also requires VPN. Enabling fallback requires that the server support multiple tunnels for a single user. The default value of this property is false.