- runs in the background and automatically detects whether the local Wifi has a working Internet connection,
- switches to 3G/hotspot mode (phone's hotsport settings used), when no working Internet connection could be found and
- turns it off again (save battery), when the local Wifi has a working Internet connection (Timer for this check can be set).
Also, you can easily activate the phone's Wifi hotspot functionality manually.
Therefore, using ChannelSwitcher, your phone can be a temporary replacement for your local Wifi network that is instantly available, when you need it.