I have a new Lumia 920 which is absolutely fantastic phone, except one annoying feature: it is not possible to connect secure WiFi network with Lumia 920!!! With open network there isn't any problem connecting, but when WiFi is secured - no matter if it is WPA, WPA2 or WEP, there is no connection. All I get is message saying something like "no response from the network, and to try again later."
That makes phone practically unusable as most of the wifi networks today are secured - for obvious reasons of course.
I spent some time with Google and looks that this is very common problem with all Lumia-phones, but nobody seems to know solution for it. Only working solution seems to be changing phone, some Lumias don't have that problem but the ones that has it are basically doomed.
Please no more advices about changing configuration of my wlan router. I've tried everything and besides that I've tested that with several different routers, on different networks and basically done everything that is possible so I know that the problem is in the phone.
Probably get a better response on the Microsoft Windows Phone forum.