When I first made the cipher change, my phone connected and I thought the problem was solved. Unfortunately I noticed a day later that the phone was no longer on my wireless network. I rebooted the router, and it was able to connect again. After another day, it was the same situation that a router reboot solved. Today in frustration I have tried using WPA only. Hopefully this will work. I don't know what else to try.
This phone, before the 8.1 upgrade, had no problem with the wireless network. I also have an old MacBook that wouldn't connect via wifi either until I changed the cipher type.
I don't understand much about this stuff but something different is going on with this router - I used to be able to connect the MacBook with a DIR-655 that I had before and the problem didn't start until I upgraded to the 857 (I connected with Ethernet to get it on my network so it wasn't urgent that I problem solve). Every other wireless device (iPad, iPhone, HP notebook, KindleHD) connects no matter what changes I make (my Kindle Paperwhite needed a wireless network reset today when I made the WPA only change, but it connected.)
Since the Galaxy4 phones are apparently having the problem too, is there any advice or solution available? I'm determined to figure this out (I can't connect my phone with ethernet!)
Thanks, Kathy