I am having some issues with my home network. Recently I bought an Asus RT-AC66R. It worked great for awhile. Recently I have seen the download speed slow down at random times. We kinda live in the sticks and have bad speed to begin with, but I can run 5 tests within 5 minutes and get anything from 3 Mbps to 400 kbps. After a router reboot today, I got 2.5+ Mbps over a 30 min period running a speed test at least 5 times. Then I turned my laptop on and it slowed down to about 1.5 while running a virus scan. I ran a speed test at the same time on my iPhone and laptop and got 2.5 on the laptop and less than 1 on my phone. I have a range extender set up, and if I'm connected to the router and it slows down, I can connect to the extender and it speeds back up again for a little (i.e. Enough time to finish a video with no interruptions), Also, not sure if it's related. But my iPhone is listed twice on my router. 1 MAC address is correct, the other is not. I would really like to figure this issue out. I will have our ISP tech come out soon to check things out. My phone has acted weird recently using large amounts of data at random times throughout the day when I'm not doing anything like at 8:15 am & pm for a week straight everyday same exact time. Please help, thanks.