Why is my download speed going so slow on my Series X? I have fiber 1000mbps on my network speeds, I'm wired. I've tried to change the port option in the network settings, put the Xbox on wifi. My UPnP is not successful and my Nat Type is Moderate. I'm using AT&T fiber optics and all of my other devices seem to do just fine. I can't figure out what the issue it and it's really bothering me.