Why doesn't my iPhones Wi-Fi work anymore?

I have recently tried to connect to 3 different Wi-Fi connections and it always says unable to connect, I tried (rebooting, forgetting network, I have the newest firmware) I just can't find what's wrong please help I don't have any warranty or anything

Try…

To reset your network settings, tap Settings > General, then scroll down and tap Reset > Reset Network Settings.

http://www.apple.com/...#section_5

Well I have different answers depending upon on what your situation is for
You may have either
A) Turned off Cellular Networking (3G)
B) If you don't have Wi-Fi anywhere around your house, make sure to check your router and see if the ethernet cable to make sure it isn't loose or anything else
C) You have Wi-Fi on your computer, but not on your Iphone. That would mean a trip to the Apple support team and try giving them a call.
That is all I know.

Powercycle it

  • Why my computer doesn't recognize my iPhone anymore? When i plug my phone into the computer, it charges but it doesn't show up on my computer or itunes. I TRIED things like youtube videos and more but it still doesn't work.It worked before but not anymore.
  • Why doesn't my netgear wireless router wnr1000 work anymore? I used it for my xbox live and one day it just stopped working? It won;t connect to anything my iphone laptop, what happened? I heard it was because it was Comcast what's the issue with it?
  • Why doesn't my iphone 3 work anymore after ios update? It recently showed on my iphone to update.So, I did and now my phone just flashes the apple sign every 5 seconds, then blank screen for 5 seconds and so on. I tried holding the reset for 10 seconds and no luck. I now have a feeling this update is for only the new iPhones. If that's the case, I really wish it didn't show up on my iphone 3. I guess that's apples way to buy new products from them? I really hope someone can help.
  • Why doesn't Cydia work on my iPhone anymore? My friend jail broke my phone and cydia and all the downloaded patches/apps were working fine until I had to turn my phone off. I turned it back on and now nothing I downloaded from cydia works anymore. Should I re install it or what?