U

Thursday, August 22nd, 2024 10:24 PM

Upload speed is a 1/4 of what is advertised.

I have the "Connect More" plan with an advertised 300 down and 100 up. My router has a built in speed-test functionality that tests the speed at the modem (not at a wifi connected device) eliminating speed loss due to wifi connection issues. When I test my speed with that function I'm seeing actual speeds of 350 down (yay!) but only 24 up.  That's less than a quarter of what I'm paying for. The fine print said that typical upload speed on this plan was 117 up. 

Any suggestions for how to unlock the full upload speed? 

Accepted Solution

Gold Problem Solver

 • 

26K Messages

2 months ago

... actual speeds ... only 24 up ...

What is the model number of your modem or gateway? Only a few are compatible with the new higher upload speeds. See:

Realize that although Comcast calls some devices "Compatible" and some "Recommended", for all but a few devices those designations only mean "compatible/recommended for use with their Internet service", and not necessarily approved for the new upload speeds.

You need one of Comcast's newer rental gateways (XB6, XB7, XB8) or one of the few retail devices shown in the "Next Gen Speed Tier" group with an upload speed rating in the "All Compatible Devices" PDF.  Also see the Reddit link, which lists the approved devices as well as other requirements for faster upload speeds.

Comcast could make all of this much simpler and clearer, but they have chosen not to do so.

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

3 Messages

2 months ago

My modem is a Motorola MB8611 | Model number: MB8611

Gold Problem Solver

 • 

26K Messages

2 months ago

The MB8611 is not compatible with the new higher upload speeds. See the "Next Gen" list at the top of the "All Compatible Devices" PDF.

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

3 Messages

2 months ago

Thank you! I just bought this modem because my old one was Docsis 3.0 and Xfinity had been telling me it wasn't supporting my speed. So I just bought this Motorola one based off of this page: https://www.xfinity.com/support/devices/#auth (not sure if you have to login to see that) but Xfinity is recommending modems solely based off of download speed (and have language that says all of these will support all of the plans that Xfinity offers--which is only true of the download speed). 

Is this the approved CODA modem that meets the "Next Gen" classification? https://amzn.to/3yXHym4

Gold Problem Solver

 • 

26K Messages

2 months ago

... Is this the approved CODA modem that meets the "Next Gen" classification? ...

As stated in the PDF:

Comcast/Xfinity rates that CODA modem for 456 Mbps upload, but only 934 Mbps download.

They rate the CODA56 for 455 Mbps upload and 2.33 Gbps download (ex: https://www.amazon.com/Hitron-CODA56-Multi-Gigabit-Certified-Spectrum/dp/B0BKZ4DHNL).

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

(edited)

forum icon

New to the Community?

Start Here