IPhone 4 has no Wi-Fi networks?

So, whenever I open up my Wi-Fi thing it says there aren't any networks to connect to when I clearly have Wi-Fi in my house. I've tried entering the network and password manually, still doesn't work. I reset my settings, still doesn't work. I turned off my phone, still doesn't work.
It's only my Wi-Fi that doesn't work, too. It works everywhere but here.So, WTF!

If your phone isn't new then they probaly took out the Wi-Fi antenna. Or *** it up. If it is new then take it to Apple and get it replaced.

I've had a few iPhones NOT recognize my wireless router. It's worth a shot to try another router if you MUST use your iPhone on your Wi-Fi.

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