Why won't my iPhone connect to my Wi-Fi?

I have an iPhone 3Gs, & the other day it disconnected from my Wi-Fi at home. I've had an iphone before I got the one I have now. & it never did that. ( I had it for over a year) The one I have now, I've had for like 6 months. I don't know what happened I looked down at my phone & my Wi-Fi was disconnecting. I keep trying to connect but it won't let me. There's no error message or anything, the little icon keeps spinning like it's still trying to connect. I turned my Wi-Fi on & off that didn't help. I turned my phone off, I reset my network setting, I reset my entire phone. None of that didn't work! I went to sleep and the next day I tried to connect it, & the little icon thing is still spinning. I know there's nothing wrong with my router because my laptop is connected to the Wi-Fi. So, i'm not sure what's going on. I mean it was just random for my phone to stop connecting to Wi-Fi. Somebody help! Is there something else I should try before I call my phone company? (AT&T)

Broke.

My brother had an iPhone 3GS and his wi-fi went bad. Do you have apple care? I think the phone is too old to be under warranty.
Sorry!

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