Stop Your Phone From Rejoining Public Wi-Fi
Matthew Leo · September 24, 2026 · Guides
Your phone remembers Wi-Fi networks so you do not have to type the password every time. That is convenient at home. It is less helpful when the saved network belongs to a hotel, airport, café or waiting room you may never visit again.
You do not need to turn Wi-Fi off permanently. On an iPhone, you can keep a network and its password while disabling automatic joining. Android menus vary by manufacturer, but you can usually turn off automatic reconnection or remove the saved network.
Turn off Auto-Join on an iPhone
- Open Settings and tap Wi-Fi.
- Tap Edit in the corner to see networks your iPhone knows.
- Tap the information button beside the public network.
- Turn off Auto-Join.
The network stays in the list and your iPhone remembers its password. You can still select it manually when you need it, but the phone should not reconnect on its own after you leave range, toggle Wi-Fi or restart the device.
If you never expect to use the network again, choose Forget This Network instead. Apple notes that iCloud Keychain can synchronize saved Wi-Fi networks. Forgetting one on an Apple device may remove it from other devices using the same Apple Account.
A supervised work or school device may not let you change a network installed by device management. In that case, the organization’s administrator controls the setting.
For a trusted home network, Mapletechie’s guide to sharing a Wi-Fi password on iPhone and Android covers the built-in options without reading the password aloud.
Change it on Android
On a Google Pixel and many other Android phones:
- Open Settings.
- Tap Network & internet, then Internet.
- Select the saved network or open the saved-network list.
- Turn off Auto-connect if your phone shows that option.
Samsung and other manufacturers may call the control Auto reconnect. Menu names can also change between Android versions.
If your phone has no per-network switch, remove the network instead. Google’s standard instructions are to open Settings > Network & internet > Internet, touch and hold the saved network, then tap Forget. You will need the password again if you return.
Some Android phones also have a setting that turns Wi-Fi back on near saved networks. On Pixel, look under Network & internet > Internet > Network preferences. Turning that off stops the phone from enabling Wi-Fi based on location, but it affects every saved network, including home and work.
Choose between disabling and forgetting
- Turn off automatic joining when you trust the network and expect to use it again, but want to approve each connection.
- Forget the network when it was temporary, its name is generic or you are not sure who operates it.
- Leave it managed when a work or school profile installed it and your administrator requires the connection.
Do not rely on a familiar network name alone. Anyone can create a hotspot with a name that resembles a hotel or café. Ask staff for the correct name when a connection matters.
What public Wi-Fi can and cannot expose
Modern apps and websites generally use HTTPS, which encrypts traffic between your device and the service. That makes public Wi-Fi safer than it was when unencrypted web pages were common. A person on the same network should not be able to read the contents of a properly protected banking session just because you share a hotspot.
There are still practical risks. A fake network can send you to a convincing sign-in page, collect information you type there or interfere with traffic that is not properly encrypted. Shared networks can also expose local-device services if file sharing or discovery is enabled.
Use mobile data or your own hotspot for a sensitive task when you are unsure about the network. Keep the phone updated, check the address before signing in and avoid installing certificates or configuration profiles requested by a captive portal unless you know why they are required.
A VPN can prevent the local network from seeing much of your traffic, but it does not make a fraudulent login page safe. It also shifts trust to the VPN provider. Use a service you already trust rather than downloading one advertised by the hotspot.
Review old networks every few months
Open the saved-network list and remove hotels, event venues, rental properties and generic names such as “Guest” that you no longer recognize. Keep home, work and other networks you use regularly.
If your phone reconnects after you changed the setting, check whether the same network was saved under a second name, restored from a cloud backup or installed by a management profile. On Android, manufacturer connection-assistant features can also make their own suggestions, so review advanced Wi-Fi settings if the standard control does not solve it.
Disable automatic joining for public networks you may use again, and forget the ones you no longer need. Your phone will still show nearby networks, but it will stop reconnecting to those saved hotspots without asking.
Sources: Apple Wi-Fi Auto-Join support, Google Android Wi-Fi support, Get Cyber Safe
Tags: Wi-Fi, iPhone, Android, Privacy, Mobile security