EDIT: changed Subject to show that the wired connection instability is no longer occasional. My WiFi connections frequently show that my devices phones, tables, laptops are "connected, but no internet". Gateway restart temporarily fixes the issue. Online diagnostic tool tells me that something is wrong that may be impacting my internet experience and offers to restart the gateway. This just keeps happening over and over and over again. Preventing me from working from home, which is less than ideal during a quarantine Wireless devices are 2 Android phones, 1 Android tablet, 2 iPhones, 2 Windows 10 laptops, 1 Windows 8 laptop, 1 MacBook pro not all online at the same time. I have reset the XT to factory defaults and had Comcast activate it. No change.

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Resolving Other Common WiFi Issues
Network connection problems that affect both Ethernet and Wifi devices are often due to poor coax connections, usually in or near your home. If you want to troubleshoot this yourself, please see Connection Troubleshooting Tips. If you still need help, please provide Information Requested for Connection-Related Posts , especially downstream power levels and SNR, upstream power levels, and error log. If they can't fix the problem remotely, insist they send a tech out to identify the cause and correct it. If the trouble is due to a faulty Comcast rental device, or anything outside your home, you shouldn't be charged. Please create a new topic of your own here on this board detailing your issue.
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Because, of course, you need to finish your work, get back to your video game, or scroll on social media. So here are a few ways to get your internet up and going again. There are two easy ways to do this. Sometimes the problem can be the device itself. Xfinity suggests xFi pods if this is your problem. If none of these steps are solving your internet connectivity issues, check for local Comcast outages. Comcast owns Xfinity.