A few days ago I've noticed Youtube videos had to buffer a lot, so I went on speedtest.net, I saw my upload speed normal; however, my download speed was 3 Mbps. I tested on wired and wireless giving the same results. I called Verizon and they told me to do the following things: change channels, reset the router, and use the optimizer with no luck. They said it was a router problem and they're sending me a new one. I'm not sure if it's a router problem. Does anyone have any advice on what do do?