Why is my comcast internet so slow?

I just got a new faster modem which is the xfinity internet box I think it's called. I pay for the fastest internet connection there's and it's still like the slowest thing ever. I need it fast for my ps4. The only thing in my house that uses the connection is two iPhones and my ps4. How do I make it faster?

P.S I called comcast already and they said they've done the speed test and thy said I already should have the fastest connection but it's still slow

I don't know where you are, but here in my area I hear all these complaints about Comcast really slowing down during the peak hours. Also the modem is not what gives you your internet speed. You only get what ever speed your internet provider sends to your modem. The type of modem you have actually has nothing to do with your internet speed. You will still get only what ever speed the internet provider sends to the modem.

  • Why my internet on my iphone is slow? I have the unlimited data plannwith c spire for my iphone 4s, at first, my internet speed, and video streaming were super fast, but now, its really slow, what's the problem?
  • Why is my iPhone internet so slow? - 1 Basically I was live streaming football earlier today and is that the cause of my phone internet being so slow? Can you get a virus from live streaming football?
  • Why is my iPhone Internet so slow? I have a brand new iPhone 4S and my Internet is really slow, my mom has a galaxy from the same company(t-mobile) and her Internet is fast, mine is only fast when is connected wireless on my house Internet. Why is it so slow
  • Why is my iPhone 4 Internet so slow even on Wi-Fi I made sure I deleted all my app history and nothing so I then turned my phone off for about 20 minuets and still nothing. I've had my phone for about 5 months and it just started happening. Should I take it in to the apple store or just rest to factory settings?