Not getting advertised WiFi Speed

@user_86efba You can pick up an ethernet cable at a Xfinity Service Center or any third party seller. You will then attach one end to the modem and the other end of a device with an ethernet port. Such as a gaming system, a PC, etc. 

I'm having the same issue. Funny enough the speedtest using ethernet are slower than the wifi speed tests.

The device you connected to your modem have you cleared cookies and cache and rebooted it? I find this very helpful. 

@user_86efba​ I just found out that in my case that windows based machines are not going to be able to get the full speed. If you can, test with a ethernet Mac, or Linux machine. My windows pcs are only getting up to 600m but the linux machine hits at full speed. (Same specs).

@user_3ff298 Thank you for reaching out to the Xfinity support team. I understand that you have had connection issues in the past few weeks and is effecting your work VPN. I would like to gather more information and review your account.

Could you please send our team a private message with your full name and full address? 

To send a Private message to Xfinity Support from any Forum page:

Click "Sign In" if that prompt is visible

• Click the "Direct Messaging" icon

• Click the "New message" (pencil and paper) icon

• Type "Xfinity Support" in the "To:" line and select "Xfinity Support" from the drop-down list which appears. The "Xfinity Support" graphic replaces the "To:" line

• Type your message in the text area near the bottom of the window

• Press Enter to send it

@user_86efba​ If you have already tried tech support and everywhere else, try submitting a ticket here. https://support.xfinity.com/svp-contact-form This goes to their executive escalations, and the people here actually know what's going on.

Good evening @user_86efba, thanks for reaching out for an update on your service. We will be glad to dig into this a bit more but will need some additional information on your current setup. 

Normally, equipment like cell phones, tablets, and gaming devices are not designed to get 1200 Mbps. This is generally because the Ethernet/WiFI adapter in these devices are limited on how much bandwidth they can send/receive. 

If possible, can you please give us some more information on the type of device/devices you are using to test the signal? For example, if you are using a Windows laptop/desktop, a Mac, or a mobile apple/android device. 

For speed testing over Wifi I use an iPhone 12 and for ethernet connection testing  I use my daughters Windows laptop. Both give identical results over multiple tests. 

Thank you for letting me know. As someone who relies on a strong connection for everything from work to entertainment, I can appreciate the concerns. What I have found is often times the equipment you are using to test the speeds do not meet all the minimum system requirements . Please look over the link, and let me know if you meet the requirements for speeds of up to 1200 MBPS.

Yes, I meet these requirements.