I have had my iphone 5 since the release date and never had any problems connecting to wifi. However out of the blue my phone asks for my broadband password but whenever I enter it in it says invalid. I have tried connecting to a friends broadband wifi and have the same problem however I can connect when it's a wifi without a password. My iPad connects to my home broadband so I know it's not a problem with my service provider. I went to the apple store today and he fobbed me off saying to speak to my broadband provider because he tried to connect to the password free apple wifi and it worked. Running out of ideas. Please help