If your WiFi is switched on in Settings > Wi-Fi but you can’t see the WiFi network you want, here are some things to check:
Make sure the WiFi router is switched on
Make sure you’re in range of the router – you won’t be able to connect if you’re too far away
Was expecting to connect to WiFi automatically
If you’ve connected to a WiFi network before, it’s easy to join it again. Your iPhone can help you do this. If you see Auto Join Disabled under the WiFi network, just tap it to switch on Auto Join. Next time you’re in range of that network, you’ll connect to the WiFi automatically.
Some WiFi networks are password-protected. So you’ll need to enter a password before you can use the WiFi. You may need to contact the WiFi owner to get their password.
If you’ve entered the correct password but see Unable to join the network or Incorrect password, restart all your devices and enter the password again.
Problems with the WiFi network
Your iPhone tells you if there are problems with the WiFi you’re connecting to. To get more information and tips to fix things, just tap the WiFi network.
WiFi still not working? Restart everything
Sometimes switching a device off then on again can fix WiFi connection problems. First restart your iPhone, then try to connect to WiFi. If WiFi’s still not working, restart the router or modem, and try again.
Still can’t connect to WiFi? Reset your iPhone’s Network Settings
Tap Settings > General > Reset > Reset Network Settings. This is the last thing to try, as it will also reset WiFi networks and passwords, VPN and APN settings, and cellular settings that you’ve used before.