Wifi service is not working

My iphone 6s plus' wifi service is not functioning after IOS update.the icon itself is not working..please help.thanks

Did you make sure that the wifi is 'ON' on your phone and you can see your wifi network on the list? Is your other devices can connect to the same wifi network?

Hi! Do you have WI-FI problems with your device?

If so, you can Reset your Networking settings by going to Settings > General > Reset > Reset Networking

Best Regards

Nicki