Why Won't my Wi-Fi connect on iPhone 4S?

I'm from the uk but in Ireland, using my grandads Wi-Fi it keeps saying password incorrect and can't join: s I've used Wi-Fi in a different part of Ireland and it worked and my mum used this Wi-Fi at my grandads 2 weeks ago with same password and it worked so I don't know what's going on. I had my data roaming off but just turned it on to ask this, please help!

I think your modem has something wrong try changing the password and try again or click blue arrow next to the network name on your iphone and click forget network and try again

Sounds like the password is being entered incorrectly.

Use the same password again on the other phone and see if there's still a problem.

If you already entered the password in previously and it worked it would have saved all this information.

The error message actually tells a lot. The password was Probably changed, if there's any laptop/desktop with Wi-Fi adapter using the same network. Download and run Wireless key Finder on that computer and it will pull a history report showing the Network Names (SSID) and keys. It will show you only what networks have been accessed before. Locate the name your respective network and corresponding key then use the same key on your iPhone.

  • 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?