IPhone 4S not detecting Wi-Fi signals?

My iPhone 4S just stopped all of a sudden picking up Wi-Fi signals. It won't show any signals in the area and when I type in the name of my Wi-Fi it says there's no such signal. My wife's I phone picks up our signal and shows other signals in the area. What is wrong and what can I do? Someone told me its the transmitter receiver in my phone and not a setting or password issue.

Added (1). Tried that fatefing

My advice would be to get an android phone. Picking up Wi-Fi on every android I have used has been a simple process rarely involving more than a swipe and a touch on my screen.iPhones are overrated IMO, but I also think Samsung is as well. Go with Motorola or HTC next time.

Settings-General-Reset-Reset Network Settings.

Then go back into Settings-Wi-Fi and try again.

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