IPhone 5 says Wi-Fi password is wrong?

My new iPhone 5 says that the Wi-Fi password is wrong, although I know it is the correct password and i even double checked by logging out and in of the Wi-Fi on my old iPhone. What can I do to fix this? I'm not very good with computers/routers and I have already tried resetting the connection.

Maybe you are pressing the wrong buttons

Are you sure you are on your Wi-Fi and not the neighbors? I know I can get signals from about 4 neighbors in my bedroom.

I had been facing the same issue from last 2 weeks. I tried below solution its worked for me, you can also try that hopefully it will fix the issue.

DON'T RESTORE YOUR PHONE OR ANY SETTINGS ON YOUR PHONE UNTIL YOU TRY THIS FIRST!

DO THIS INSTEAD - RENAME YOUR WIRELESS NETWORK!

You will need to login to your router through either software on your computer or through your internet browser. Check the web for instructions on how to log into your particular brand and model of router. Typically though you can just enter your router's ip address into your web browser. Below is a list default router ip address for the most common and popular wireless routers. Equally useful there are pages all over the web listing default username and passwords to log into your routers home page depending on your brand and model of router. Once there you should find options and have the ability to RE-NAME your WIRELESS NETWORK. Once I had logged into my router's home page I then RE-NAMED my wireless network AND CHANGED THE PASSWORD and clicked apply to save the changes. When the page was finished I turned my iPhone 5 Wi-Fi back on and tapped the newly re-named network and entered the new password and SUCCESS! It worked on the first try! I hope this helps those with the same problem!

3Com192.168.1.1
Apple10.0.1.1
Asus192.168.1.1, 192.168.1.220
Belkin192.168.2.1, 10.1.1.1
Buffalo192.168.11.1
Dell192.168.1.1
D-Link192.168.0.1, 0.30, 0.50, 1.1, 10.1.1.1
Linksys192.168.0.1, 1.1
Microsoft192.168.2.1
Motorola192.168.10.1, 20.1, 30.1, 62.1, 100.1, 102.1, 1.254
MSI192.168.1.254
Netgear192.168.0.1, 0.227
Senao192.168.0.1
SpeedTouch10.0.0.138, 192.168.1.254
Trendnet192.168.0.1, 1.1, 2.1, 10.1,
US Robotics192.168.1.1, 2.1, 123.254
Zyxel192.168.1.1, 2.1, 4.1, 10.1, 1.254, 10.0.0.2, 0.138

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