I turned my Wi-Fi off and when I turned it on again it won't connect to my home wi-fi. I disconnected and tried to reconnect, but it still won't work. All my other devices are connected without issue.
Reboot your phone. In other words power it off and then back. This should correct the issue.
Sadly that did not work. Either did forgetting the network and reconnecting, turning on airplane mode then turning it off, turning the phone off and taking the battery out.
This will take a little work, however do the following.
1- Turn off the broadband modem.
2- Turn off the wireless router.
3- Turn off your cell phone.
Wait 5 minutes and then
1- Turn the broadband modem back on and let it fully boot up.
2- Turn the wireless router back on and let it fully boot up.
3- Turn on your cell phone.
4- Click on WiFi on the device and see if you can see your network.
5- Click on the ssid name and enter your password for the network.
6- Click on connect. You should then be on your network.
Now in certain cases you may need an update to the firmware on your broadband modem and or wireless router. If there is one simply get it since its free. If not available you will need a new modem from your ISP or buy a new wireless router to be able to connect to your device. They are not all compatible with many cell phones.
Hopefully you will be lucky and the above will allow you to use your WiFi.
Good Luck