The Constant Interruption
By default, the iPhone is aggressively programmed to keep you connected to the internet. If you are walking down a city street or sitting in an airport and your iPhone loses its cellular connection, it will instantly begin scanning the environment for open public Wi-Fi networks. It will then violently interrupt whatever you are doing—pausing your music, blocking your web browser, or overlaying your text messages—with a massive “Ask to Join Networks” pop-up. From a security standpoint, connecting to random, unencrypted public Wi-Fi networks is highly dangerous. To secure your device and prevent these constant interruptions, you must force the iPhone to ignore unknown networks.
How to Turn Off Ask to Join Networks
You can permanently strip the iPhone of its ability to prompt you for public connections via the Wi-Fi settings.
- Open the Settings app on your iPhone.
- Tap on Wi-Fi.
- Ensure your master Wi-Fi switch is turned on so the lower menu appears.
- Scroll down below the list of available networks and tap on Ask to Join Networks.
- Change the setting from “Ask” to Off.
Silent Operation
The change is instantaneous. The iPhone will completely terminate the background alerting mechanism. If you lose cellular service, your phone will still passively scan the area, but it will never again throw a pop-up onto your screen demanding that you connect to a random coffee shop router. It will only ever connect to known, trusted networks that you have previously saved, ensuring a secure and uninterrupted user experience.