If your iPhone, iPad, or iPod touch won"t connect to a Wi-Fi network - Apple Support
Check for issues with your Wi-Fi network
If iOS detects an issue with your Wi-Fi connection, you might see a Wi-Fi recommendation under the name of the Wi-Fi network that you're connected to. For example, you might see the alert "No Internet Connection." To get more information, tap the Wi-Fi network.
Check your cables and connections
If you still can’t connect to your network or get online, make sure that your router is connected to the modem and turned on.
Restart
Try restarting your iOS device, router, and cable or DSL modem. To restart your router or modem, unplug it, then plug it back in.
After you restart each device, see if you fixed the issue.
Still can’t connect?
Reset your Network Settings. Tap Settings > General > Reset > Reset Network Settings. This also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you’ve used before.
Get more help
- If someone else set up your network, ask them for help. If you’re using a network at a company, school, hotel, store, or other free Wi-Fi location, find an employee for assistance.
- If you're connected to a Wi-Fi network but you can’t get online, try to use your Wi-Fi network on other devices. If you can’t get online using your other devices, there might be a service outage. Call your cable company or internet provider for help.
- Try connecting to a Wi-Fi network in a different location. If your device can connect, you need to get help with your Wi-Fi network. If your device can’t connect to any Wi-Fi networks, contact Apple.
- Update your Wi-Fi router with the latest firmware and make sure that the router supports your Apple product. For more information, contact the router's manufacturer.
Reboot the router.
Check if you have new firmware from the router website.
Try using free wi-fi in Starbuck, McDonald, Apple Store, ... and test if it's your router issue.
Wifi Problem iOS 11.2.6
