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

So i have a iphone 4s and i have a Wi-Fi system set up in my house and when i go onto my iphone and go to Wi-Fi my home's Wi-Fi name is there but when i put down the password it says," unable to join the network" then it asks me to dismiss. I'm pretty sure i have my right password since i was the one who made the password and i can log on to ipods and laptops with my network but it does NOT want to work for any iphone.mine, my friends, no iphones. Is there something i have to do to let the Wi-Fi enter my phone?

Broken

That happens to me sometimes to, when it says unable to join, just keep clicking join if your sure its the right password.
When I put in the right password, it says unable to connect so I usually have to keep clicking join a couple times and then it works.

Go to settings, Wi-Fi and click on the arrow that says your Wi-Fi id. Now press "delete this network" and try again

  • 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:?
  • Why won't my iphone 4 connect to a certain Wi-Fi network? I have tried countless numbers of times to connect to a certain Wi-Fi network but continue to receive the same message, "Unable to join… ". I have reset the network settings in my phone but it still doesn't work. Any suggestions?
  • Why won't My sprint iPhone 4 won't connect to 3G? Before you say call them I already have ok. Today I had an upgrade but my aunt used it for her phone since I'm on her plan. It went good but then won't connect to 3G after that we called and they said something went wrong but nothing did so I'm wondering is there anything i could possibly do to fix it or should I call the place that did it? Or should I just call sprint or apple? Please help I have to use my phone a lot in places that don't have Wi-Fi.
  • Why won't my iTunes connect with my iPhone? I try to connect my iPhone to my computer to sync to iTunes but then a little window pops up that reads "This iPhone can't be used because the Apple Mobile Device service is not started." What does this mean and how do I fix it?