Visitor

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3 Messages

Sunday, May 17th, 2026 4:12 AM

Unreliable Internet Speeds: From 1300mbps to 300mbps.

For some time now, our home internet has proven very unreliable. The Xfinity app's speed tests seem to report that the internet speeds will vary on a moment to moment basis, where one minute it's a little above 1300mbps (the usual internet speed we had before this was an issue), but then suddenly drops out to 900, 700, or even lower than that. I have seen the number go down to double digits. The test itself sometimes 'freezes,' where it displays the same unchanging number for a few seconds or even the rest of the speed test, like it isn't able to update or receive information from the router.

Usually this is manageable enough, but at times where it drops down low enough it will boot us from things that require a constant internet connection, and more frequently causes stutters. The general trend seems to be a cycle between brief moments of high speed before slowing down dramatically, but never quite reaching zero.

As of right now, the speed test I am taking right now went from fluctuating around 500-700mbps before suddenly going back up to 1200. Funnily enough, because the internet speed test ended on ~1200, the app said that the internet was actually looking good. Needless to say, this assessment is wrong. If it's anything, the Xfinity AI assistant also apparently detected something strange going on about our internet, but I hesitated to bring a technician out here.

Restarting the router does not work, before anyone asks. On top of this, we finally got a fresh leased router and coax cable, however this has not changed anything. Apparently there have been a few instances of work being done in our area, but this has never seemed to do anything. For reference, our current plan is for 1100mbps.

Has anyone else had problems like this, and any ideas as to what it could be? What did you do to fix it? Should I even be using the Xfinity app's speed test for this?

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Official Employee

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2.7K Messages

13 days ago

Good evening @user_59e19b, and thank you for reaching out on our Community Forums regarding your fluctuating speed concerns-we truly appreciate your time!

 

I completely understand how frustrating unstable internet can be, and our team is here to help get this resolved. I see that you’ve already tried restarting your router, so thank you for giving that a try.

 

To help us narrow things down, could you please confirm that all cable connections are securely tightened? Additionally, are you running your speed tests while connected via Ethernet (hardwired) or over WiFi?

 

Visitor

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3 Messages

All cable connections are secure, but I have been running my speed tests over WiFi using the mobile Xfinity app. I'll see about figuring out how to use Ethernet for a speed test soon, if needed. Would the Xfinity app continue to work for these tests, or should I use some other alternative?

Official Employee

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2.1K Messages

 

user_59e19b While you are hardwired you can use our website to test the speeds here.
This will help us rule out if it's a wireless signal issue or a service issue to the modem. 

 

I am an Official Xfinity Employee.
Official Employees are from multiple teams within Xfinity: CARE, Product, Leadership.
We ask that you post publicly so people with similar questions may benefit from the conversation.
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Visitor

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3 Messages

4 hours ago

I have yet to acquire an Ethernet cable for a direct speed test, however I have noticed that many other devices struggle with internet speeds at the same times as my computer does. However, according to the Xfinity account dashboard there is some kind of unnamed issue that I need to schedule a technician for. If/when I am able to do so, I'll update this post with the results to further narrow down the issues. It is also worth mentioning that there was yet more maintenance done today, though it did not seem to influence me whatsoever.

As of yesterday, I am no longer able to use the Xfinity app, as my mobile device has been declared outdated by its newest update. Until I am able to scrounge up two or three hundred dollars for a more modern mobile dvice (unlikely to be soon), I have doubts that I will be able to follow up to this properly. The Xfinity app is the only way to manage or organize anything related to home internet, so consequently I and many others are suddenly unable to do anything. 

If I manage to afford and schedule a technician, I will report back with the findings and if the ongoing internet speed issues have been resolved or not. Outside of this, I have doubts that I can do much else. Whether or not I report back with success, I appreciate the attempts to help.

(edited)

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