How come I can't get Wi-Fi on my iphone?

Ok so everyone in my house gets Wi-Fi on there phone but me i'm the only one in my house that has a iphone and i can't seem to get Wi-Fi I had the problem since I first got my my phone. I tried turning it off for a couple of minutes then turning it back on and it still did not work. I really am just to the point of returning my phone.

That's what happen when I got my iPod and iPhone you only need to wait a day and it will connect the next day

If your Wi-Fi has a password you need to enter on the phone in order for it to work. I if you already checked that, try reset the router, you can do this by pressing a little button located on the back of the router in a little whole! I use a tooth pick or something small enough. I press and hold for about 20 seconds.