Router XB8 issues

@XfinityDevinC​  Hi. I hooked up the new XB8 this past Wed 3/9 during the evening.  Everything seemed fine. The next day things were still good and I returned my old XB7. Later in the afternoon that Thursday the device just rebooted itself. Since then I have seen issues where the xFi app was showing devices were not connected but they were. It also showed instances for a few devices where they showed up in the app twice. Sometimes the device would be listed as both disconnected and connected at the same time. I have rebooted multiple times including unplugging and the issue is still there. It appears that all the devices are actually connected but the xFi app is wonky. The biggest worry is that I may not be getting the correct speed to the router itself. With the XB7 I always got 1200 MBPS or better. Now I am lucky if I get 1200MBPS. I have gotten speeds as low as 300MBPS where it tells me we need to reboot the device which I do to no avail.
Starting today I now get the message "Its Time to update your xFi gateway. Your Current xFi gateway can't keep up with Internet Speed.  Don't worry - we will set you up with a new one for no additional cost." I click on the Update Gateway button and it brings to a page that say I have the latest equipment. In summary all my devices are connected but the app gives me conflicting information and I can't tell if I am getting the speed I am paying for.

@Dwc1961

Thank you for letting me know what you have tired and what all you have been seeing.

This helps a lot to not repeat these steps you have taken as I mentioned but also it helps to narrow this down. We would like to take a look at your account so we can check for any signals that are out of sync or possible issues with the speed codes we have on your modem. We are here to offer our full support but to protect your personal account information, we ask that you send us a direct message. I have posted the steps below, could you send us a direct message at your convenience, please?

Here's the detailed steps to Direct Message us:
• Click "Sign In" if necessary
• Click the "Direct Message" icon (upper right corner of this page)
• Click the "New message" (pencil and paper) icon
• Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list
• Type your message in the text area near the bottom of the window
• Press Enter to send your message

@G_V

We are here to help you as well. Please post any additional questions you have and we are happy to discuss this with you further :). 

@chungchu​ I, too, received the new XB8 as a reward and it has been odd, at best. Terrible WiFi range and over the course of the first few weeks, it’s dropped all my wireless devices and needs to be unplugged to reconnect to them. Frustrating start … the XB7, while also imperfect, never dropped the signal nor lost connection with devices. 

@xfn​ 

it sounds like the issue, if your devises are on the 5GHz frequency, that is the problem with the xb8, and comcast states they dont have a fix, that is why they only are giving it to a "few" diamond folks as gifts(diamond= we pay the huge comcast prices for years) press comcast to fix it and get a solution for all of us that have the router

Thanks for the response.  I have had this router for probably 10 years, so it's probably not the newer model.  But I have no clue what model it is. 

@chungchu Hello and thank you for reaching out with your concerns with the XB8. I can understand how this would be a frustrating experience. Did you end up keeping the XB8, or did they swap the XB7 back for you? I have been trialing the XB8 for the last couple months and haven't had any issues, but I have heard of the issues you mentioned and I know we are actively taking feedback and working out any bugs during the trial process. 

Hi, thank you for reaching out to Xfinity Forums. At this time all rented modems do not have the ability to change the modems configurations. I apologize for any inconvenience. 

Hey there, thanks for reaching out through Xfinity Forums! We would be happy to help you with your XB8 connection. Are the printers the only devices you are having issues connecting? 

I am having the exact same issue with not being able to connect my HP wireless printer through my new XB8 router. I have had plenty of other issues since getting the XB8 and now have to bypass wifi for some items cause it's so bad. However,  I am unable to use ethernet for my wireless printer and I MUST BE ABLE TO PRINT ASAP!  What can I do to fix this? I have tried everything. 

Thank you for contacting us on the forums, @user_4445e0! I'm so sorry to hear about these issues you're having with the XB8. Are you still having the same issues?

Also having this issue.  Seperst said on all 3 bands. Printer sees 2 4 Ghz ssid but won't connect after password entered.  xB7 roughter worked fine befor upgrade. Tried a factory reset of print. Tried unsussfully WPS push button in admin console. Printer detests was and button pressed but never resolved. If you have to print, hard line to rj45 or to printers internal wifi till problem is figured out.

SOLVED!...

XB8 default the 2.4Ghz Band to WPA3-Persional-Transistion.  HP printers only talk in WPA/WPA2 and WPS.   I wen on to my xFi app. Clicked on Connection tab on the bottom. Changed Security Mode to WPA2 and applied.   Now that didn't work the first time.  But after I turn off broadcasting of my ssid. Manually entered in the same in my printer and password... boom i was in.  I then turned back on broadcasting of ssid and everything stayed connected.   The turning of of the broad casting may not have been necessarily need... but I included it just caus that what got me working.   Enjoy!