Why can't my iphone connect to my Wi-Fi?

I have an Iphone 4 with iOS 7.1.2 and I'm not finding any Wi-Fi, even when I rest my phone on/next to the modem. When I pull up the bottom menu, the Wi-Fi signal is greyed out and when I go to setting, Wi-Fi is off and faded and I can't turn it on.

Is it on airplane mode?

  • Why won't my xbox 360 connect to the internet but will connect to my iphone hotspot? Ill play cod bo2 almost daily and my xbox will connect to my mobile hotspot on my iphone 4s fine, but out of no where it will lag out and disconnect me from xbox live, its not a hardware issue everything connects normally, full bars and everything the phone still lets me get on the internet, but my xbox will not, why D:?
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  • Why can my laptop connect to Wi-Fi signals that my iphone can't? So i have a iphone five and i have free access to bt openzone and o2 Wi-Fi, only problem being that i can't pick up the Wi-Fi signal on my iphone to connect to them. however my old dell inspiron | 1000 can pick up these Wi-Fi signals from the same house? What the hell! I want to use this Wi-Fi as its free, but my phone but it won't pick it up but my laptop can! Any ideas on how i can fix this?
  • When I connect to a Wi-Fi hotspot, I can't connect to Gmail or Twitter? My iPhone connects to other people's networks fine, but when I'm using public hotspots gmail and twitter say no Internet connection. Why? Is there a way round it?

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