I have a WNDR3700v2 router with DD-WRT v24-sp2 (06/14/11) std. If I enable the dual band 5Ghz AP and leave it with no security enabled, my iPhone 5 is able to connect to it without any problems and I get my full bandwidth of 50/5. I added WPA2 Personal TKIP and it won't connect after I put in my password. Obviously I tried restarting the phone, rebooting the router, I've yet to completely clear the entire router's settings to factory and try again. I also have a Time Capsule and I have it set to 5Ghz only with WPA2 and my iPhone 5 connects fine. I'm wondering if it's my router or has anyone else been having problems like this?