Wi-Fi doesn't work in iphone 4S iOs 7.1.2?

When i switch on Wi-Fi, the button becomes green but the Wi-Fi mark doesn't appear on the top of the screen and Wi-Fi doesn't work.
I tried restoring the network settings, restoring the network settings after switching on airplane mode, rebooting the phone, restoring the phone from a back up, restoring the phone as new but still it doesn't work!

Perhaps it could be just your Wi-Fi network having some issues. Try switch everything off and turn it back on and see how it goes.

If still no luck then best visit apple store or contact apple care for technical support.

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