Here is iOS 8.4.1 WiFi not working fix for those users who have encountered with such type problems after upgrading to latest software. According to users reports wireless networking on their updated iOS 8.4.1 devices simply refusing to work. We offer you few tips to fix iOS 8.4.1 WiFi not working issues.
The first tip is to try to hard reboot your iOS device
Simultaneously press and hold the sleep/wake button and the Home button for around 10 seconds. Your iPhone or iPad turn itself off completely and then it will turn back on automatically. Release both the buttons when you see the Apple boot logo on screen.
The second tip is to restart router/modem
When strange WiFi problems are happening on your device a restart of your router or modem, or even both, is often a good thing to do. More often it fixes problems like this. Wait for at least 20 to 30 seconds before turning your router back on.
Third tip: turn off Location Services for Wi-Fi networking
As you can see on the picture below this setting is disabled by default. Go to Settings > Privacy > Location Services > System Services, then disable Wi-Fi Networking. Then reboot your iPhone.
It’s a long shot, but it has been known to stop WiFi from working correctly. Try it, and if it works, then try turning it back on afterwards to see if it has an effect.
Fourth tip: point WiFi connection to Google DNS servers
Bad DNS servers can cause chaos with WiFi connections, so dump your ISP’s servers and use Google’s instead. You’ll find the Google DNS servers at 184.108.40.206 and 220.127.116.11. Both are free.
The fifth tip is to reset network settings
Note that using this tip it will reset all of your WiFi passwords in iOS. To fix iOS 8.4.1 WiFi not working issue go to Settings > General > Reset > Reset Network Settings.
The sixth tip is to restore to iOS 8.4.1
To fix iOS 8.4.1 WiFi not working problem you can completely wipe your iOS device by restoring it to iOS 8.4.1 fresh from iTunes. Before you do this, make sure you do a backup first either through iTunes or iCloud.
The last tip is to take your iOS device to Genius Bar
If you have tried all the above mentioned tips and you still suffering from the problem then let one of Apple’s Geniuses take a look on your device. Sometimes it happens that something has gone awry with your hardware. It will work, especially if you’re still covered by AppleCare!