Why isn't my Wi-Fi working anymore on my Iphone 4S?

It just suddenly stopped working. I mean, only if I have the phone 2 feet or less from the router, only then it will connect to Wi-Fi. If I'm more than 2 feet away, it won't find the router. It's not just on my router at home. It's happening with my mom's router too and I'm in a different state. Anyone know what the issue is?

Reboot the iphone… Work now?

If not, do a system restoral on Itunes… Work now?

if not, call Apple at 1800myiphone or see AppleStore

worse case senario, your Wi-Fi attena burned out---- get a new iphone under free warranty (if you still have free a warrranty left, if not--cough up $$$$$ for another iphone)

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