Switching between Wi-Fi and 3G usage has been one of the most common issues faced by iPhone users. Apple has introduced a small but impactful change to address this. Previously, iPhones would automatically attempt to connect to a previously joined Wi-Fi network, often leading to slow internet speeds or unresponsive webpages. Managing this required constantly turning Wi-Fi on and off, which was both time-consuming and inconvenient. This was especially problematic with public Wi-Fi networks that automatically connect and cause disruptions. With iOS 9, Apple introduced the Wi-Fi Assist feature, a lesser-known but practical solution to these issues.
When Wi-Fi Assist is enabled, your 3G data connection becomes more active. If the Wi-Fi network you’re connected to is slow or causing problems during usage, the device will automatically switch to the 3G connection for a smoother experience.
This transition won’t happen without your knowledge—you’ll be aware of the switch and can cancel the connection if desired. Wi-Fi Assist is one of the subtle yet beneficial updates in iOS 9, aimed at enhancing the user experience.