I've noticed that my speeds are well below my Internet plan (Extreme 250) and I did a little research and discovered that there is a hidden network that works with mine. This is Comcast's home security service, and while I don't have it, it annoys me that the network can't be removed or disabled. I suspected this was causing my internet speed to slow down, so I bought a Motorola MT7711. It was very easy to set up and the hidden network was gone and my speeds increased significantly. The only downside I've found is that the Motorola Modem Magazine website doesn't provide a way to view a list of devices that have access to the router. The Xfinity modem site allowed me to manage them (delete for example).
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