What to KnowWindows 10: Go to the network adapter settings, select Wi-Fi Status, and turn off Connect automatically when this network is in range.iOS: Go to Settings > Wi-Fi. Tap the (i) next to the network name, then toggle off Auto-Join. Android: Go to Settings > Network & Internet > Wi-Fi > Wi-Fi preferences. Toggle off Connect to public networks.
This article explains how to manage your Wi-Fi settings if you want to turn off Wi-Fi auto-connect. Turning off Wi-Fi auto-connect is a good idea because connecting to an open Wi-Fi network, such as a free wireless hotspot, exposes your computer or mobile device to security risks.
How to Disable Automatic Wi-Fi Connections
Computers and mobile devices work differently, so follow the directions that pertain to your device.
In Windows 10, go to the network adapter settings, select Wi-Fi Status, and turn off the Connect automatically when this network is in range option. It's similar for Windows 8 and older versions of Windows.How to Disable Automatic Wireless Connections on Windows
iPhone and iPad devices associate an option called Auto-Join with each Wi-Fi profile. When enabled, your device connects to that network automatically when it's within range.
To stop that from happening for any specific Wi-Fi profile, go to Settings > Wi-Fi, and tap the small (i) next to the network name to find the Auto-Join button. Disable it to turn off the auto-joining feature.
This should work in iOS 11 and newer versions of iPhone and iPad.
If you want your phone or tablet to quit asking you to connect each time you're within range of a network you haven't used before, such as an open network in a hotel or restaurant, go to the Wi-Fi settings page and disable Ask to Join Networks. If you keep it on, you'll be prompted to connect to each network your device finds, so having the feature off means you have to open this screen to manually select the networks you want to join.
To stop your Android device from auto-connecting to open networks, open the settings and go to Network & Internet > Wi-Fi > Wi-Fi preferences. Then, turn off the Connect to public networks toggle switch to disable it.
This is confirmed to work in Android 10 Q for Pixel, but might work in older versions of Android, too. If you don't see these specific screens, look through Settings for something like Mobile Networks or Connections.
Select the gear/settings icon next to the network to which you're currently connected to forget the connection details so that you don't auto-join the next time you're in range.
Instead of turning off Wi-Fi auto-connect, consider completely disabling Wi-Fi to avoid using it altogether, regardless of the network type or whether it's a saved, new, open, or secured network.
Forgetting Wi-Fi Networks
Something else to remember beyond open networks is that your device may be set up to remember connections you used in the past, whether open or not. Saving network information is a great feature so that you don't have to keep re-entering or re-selecting each network you want to reuse.
However, if you want total and complete control over which networks you connect to, forget the network. Most devices have an option to delete the profile associated with the connection.