I have the Asus Black Diamond RT-N56U. I configured the 2.4Ghz and 5.0Ghz wireless settings exactly the same. I have an issue with poor signal performance in the upstairs of my house, which isn't that far, but for whatever reason it's very poor quality in the signal on my cell phones, Nexus 7 and Kindle Fire. Any suggestions on how to configure wireless? I am going to try to disable the 5GHz band to see if it improves anything for me. I don't need the highest speeds; I need only enough for fast internet speeds on my laptop, but not for file transfers. Thanks for any advice!