Have you ever watched your iPhone attempt to load a webpage with a poor Wi-Fi connection, and wondered why it doesn’t just switch to 3G automatically? In currently iOS releases, your device can’t do that. If you’re connected to a Wi-Fi network, it will only use the Wi-Fi network. But iOS 6 changes that. You’ll soon be able to use “Wi-Fi Plus Cellular” connections, which allows apps to switch to a cellular data connection automatically when Wi-Fi is poor.