My iphone won't connect to wi-fi

My phone used to connect to wi-fi no problem, my university has a very fast connection across campus. After dropping it one night (oops) my phone seemed to work fine, but a couple days later it stopped using the wi-fi connection and now when i go to wi-fi in settings, itt says "off" and it won't let me change it to on. Is there any way to fix this without taking it to the store?

I had the same issue as the users on this page and I finally figured it out!!!
I'll give some background on what I was experiencing first. When I got my phone, it was able to detect and connect to my home wifi. I saw that wifi icon on the phone so I knew that I was connected. When I would launch Safari or YouTube, it discards the wifi connection and defaults to the edge network. Opening up iTunes would prompt me to connect to a wifi network.
At first I thought it was the phone until I was able to connect to my work wifi. I tried rebooting my wireless router and modem...no success. I tried restoring my iPhone...no success. I tried the "forget the network" and "renew lease"...no success. After trying those different things, I narrowed it down to the actual wireless router setup.
Since my laptops were able to connect to my home wifi, I figured that the iPhone was not able to connect even though I was entering the correct key. So what I did to test out the connection was I turned off the security and made my network invisible just in case I would be testing for a long period of time. Right away, I was able to connect with my iPhone! Knowing that I was able to connect, I checked the type of security I was using. I was using a 64 bit WEP encryption and I switched it to WPA (more common with Macs). That worked too! If you want to use WEP, try using a 40 bit or 128 bit encryption. That might work as well.
Hope that helps out some people. Good luck.

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Message was edited by: Bob Timmons
Message was edited by: Bob Timmons

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~~~~~~~~~~~~~~~~~~~~~~~~~
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http://ipadnerds.com/fix-wifi-issue-ios-7/http://ipadnerds.com/fix-wifi-issue-ios-7/
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http://www.theipadfan.com/workaround-ipad-wifi-issues/http://www.theipadfan.com/workaround-ipad-wifi-issues/
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http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/http://tabletcrunch.com/2012/10/27/fix-ios-6-wifi-problems-ssid/
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http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/http://tabletcrunch.com/2012/09/27/fix-ios-6-wifi-problems/
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http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/http://www.zdnet.com/apples-ios-6-wi-fi-problems-linger-on-7000004799/
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http://ipad.about.com/od/iPad_Troubleshooting/ss/How-To-Fix-My-Ipad-Wont-Connect -To-Wi-Fi.htm
iOS: Connecting to the Internet http://support.apple.com/kb/HT1695
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http://osxdaily.com/2012/03/21/fix-new-ipad-3-wi-fi-reception-problems/
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How To Fix iPhone, iPad, iPod Touch Wi-Fi Connectivity Issue http://tinyurl.com/7nvxbmz
Unable to Connect After iOS Update - saw this solution on another post.
https://discussions.apple.com/thread/4010130
Note - When troubleshooting wifi connection problems, don't hold your iPad by hand. There have been a few reports that holding the iPad by hand, seems to attenuate the wifi signal.
Some Wi-Fi losses may stem from a problematic interaction between Wi-Fi and cellular data connections. Numerous users have found that turning off Cellular Data in Settings gets their Wi-Fi working again.
You may have many apps open which can possibly cause the slowdown and possibly the loss of wifi. In iOS 4-6 double tap your Home button & at the bottom of the screen you will see the icons of all open apps. Close those you are not using by pressing on an icon until all icons wiggle - then tap the minus sign. For iOS 7 users, there’s an easy way to see which apps are open in order to close them. By double-tapping the home button on your iPhone or iPad, the new multitasking feature in iOS 7 shows full page previews of all your open apps. Simply scroll horizontally to see all your apps, and close the apps with a simple flick towards the top of the screen.
Wi-Fi or Bluetooth settings grayed out or dim
http://support.apple.com/kb/TS1559
~~~~~~~~~~~~~~~
If any of the above solutions work, please post back what solved your problem. It will help others with the same problem.
 Cheers, Tom

My iphone won't connect to wi-fi

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