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blboyano
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Friday, February 28th, 2025 5:21 PM

Netgear CM2050V upload speed not performing

I have a Netgear CM2050V modem and currently have the 2000mb/300mb and am only getting 41mb upstream.  A technician has come out and validated everything up to the modem.  Upon researching the issues, there was a bug in the CM2050V a year ago or so.  The issue was corrected and then apparently firmware was downgraded due to stability issues.  The issue was to be addressed within 90 days or so.  We are now a year down the road and I have this issue.  Can you provide any insight?  Do you just need to push an updated firmware down? 
Thank you.

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1 day ago

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XfinityEva

Official Employee

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1.6K Messages

2 months ago

Hey there, thank you for taking the time to reach out to us through Forums. We can take a look at your plan make sure it is updated as well. We understand that you have previously had a tech out so we can follow up on those findings as well. Feel free to send us a direct message with your full name and service address to get started. 

 

We also would recommend checking out the more on the enhanced speeds here. 

 

  • Make sure you are signed in here in the Xfinity Forum. Click "Sign In" if necessary
  • Click the "Direct Message" icon (square chat icon in the upper right corner of your screen next to the bell 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

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araposo8

Contributor

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17 Messages

1 month ago

I am seeing this same problem. About 900 down and 40 up. 

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araposo8

Contributor

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17 Messages

I had a tech come out and they confirmed that the output of the modem is 2000 down and 41 Up. So there is a profile/boot file issue with this modem. PLEASE FIX THIS COMCAST

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1 month ago

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XfinityPaula

Official Employee

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1.4K Messages

araposo8 Thank you for following up with us and letting me know the technicians findings. With our gigabit x2 speeds the upload offered is 300 Mbps. I'm sorry that you are not seeing that speed on your devices. I know how important it is for our services to deliver 100%. I would love to help out and make sure that we have this corrected. 

Please send us a direct message with your name and service address. 

To send a direct message, please click on the chat icon in the top-right corner of the screen, and select "Xfinity Support" to initiate a live chat. 
Click "Sign In" if necessary
Click the "direct messaging" icon or https://comca.st/3J0ir1l
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

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1 month ago

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araposo8

Contributor

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17 Messages

I sent a chat message. Thanks

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1 month ago

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techie301

Regular Visitor

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5 Messages

1 month ago

I am seeing a similar problem with my CM2050V, using Gigabit Extra in an Enhanced Speed/Network area. I am in San Jose, CA, and my neighborhood was upgraded this past summer of 2024. My CM2050V is running firmware V10.01.03, and on Gigiabit Extra, I should receive 1300/300 (under the new plans announced on March 11, 2025). Xfinity support told me that the CM2050V is NOT approved for Enhanced, yet I have seen others on this forum receive a resolution to the new speeds. My speeds are consistently 1200/41Mbps. I have power cycled the modern, and no difference. Can I get some assistance and clarification? I really appreciate any help you can provide.

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BruceW

Gold Problem Solver

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26.3K Messages

1 month ago

... CM2050V, using Gigabit Extra ... I should receive 1300/300 ... My speeds are consistently 1200/41Mbps ...

The CM2050V is compatible with their Internet and home phone services, but not with the higher upload speeds they introduced in 2023. See the "Next Gen" list at the top of the "All Compatible Devices" link near the bottom of https://www.xfinity.com/support/devices (at the moment that link points to https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2025.03.06 Full List of Compatible Devices.pdf, but this changes from time to time).

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

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.

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Anon7568482

Frequent Visitor

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7 Messages

Now  that Xfinity finished testing and has deployed in areas the latest firmware for the Netgear 2050V (Cable Firmware Version V10.01.03) are there plans to test the 2050v for the Next-Gen Speed Tier?


This would give the higher upload speeds.

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17 days ago

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XfinityMarcus

Official Employee

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1.4K Messages

Anon7568482 thank you for using the Xfinity Community Forums page to reach out. A specific timeline on when such test could/would take place is not currently available. 

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.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

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15 days ago

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edjames

10 Messages

11 days ago

I'm in the same boat as the OP.  DL speeds were good, but was only getting 40 mbps UL with my CM2050V with the older and then with the new FW.  I tried a bunch of things which made no difference.  Now, as of yesterday morning, I'm seeing Gigabit X2 speeds both UL and DL with my CM2050V, specifically I'm seeing 350 mbps UL.

The changeover in speed occurred after I tried to activate a Hitron Coda56 modem on my service.  After an hour of trying to self-activate and then another hour of working with Comcast support, I was not able to get it activated because apparently, a non-voice modem cannot be activated on a service that has voice.  I don't know if it was going through the process of trying to get the Coda56 activated, or whether it was due to having the CM2050V unplugged for a few hours, but after I reattached the CM2050V, I surprisingly found that UL speeds were 350 mbps from an etherneted computer and just under 300 mbps from a wifi 5 computer.

I am a little worried that something will happen to cause the UL speed to drop again to 40 mbps because something similar happened when I first upgraded to the X2 service with the CM2050V modem back in November.  Initially UL speeds were 80-90 mbps immediately after upgrading to the X2 service, and then after a few weeks or maybe a few months, UL speed dropped to 40 mbps.

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XfinityAmira

Official Employee

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4.1K Messages

Hi edjames! Thanks for reaching out on our Xfinity Forum, letting us know you're also running into upload speed concerns. We appreciate you providing some insight on your experience and some things you've done on your end in trying to rectify this. Please know my team is here to support you.

 

I do want to confirm, currently, are both the upload and download speeds closer to where they should be on your end?

 

We look forward to hearing back from you!

(edited)

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.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

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9 days ago

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edjames

10 Messages

@XfinityAmira​, yes I'm finally getting the advertised Gigabit X2 / next gen speeds with my CM2050V.  Hopefully nothing will happen that causes the UL speed to drop back to 40 mbps.

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6 days ago

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NetGeekJay

Visitor

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4 Messages

@edjames​ This sounds very promising. Just spent a couple hours with Comcast chat where they said, the 2050V is not compatible with their 2100/300 plan, and of course I need the voice line for for some older modem thing that works great with it currently (doesn't work with AT&T VoIP as they compress evidently).

Going to try and unplug and wait a few minutes, though like my Comcast "region" in the SouthEast hasn't staged the new firmware or something yet. Grrr. The tech sent an "Advanced Reset" heh. Still stuck at 41Mbps upload... though did improve download from 2050 to exactly 2100.

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5 days ago

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XfinitySara

Official Employee

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1.7K Messages

Thanks for letting us know, @edjames! That is excellent news. Our team is great to work with because we'll remain here, on this platform, to support you and your household however we can, should anything else come up. And if you do have more questions or concerns arise, please feel free to create your own new post to ensure we get to it quickly and properly address things regarding your particular account, service, and equipment. Thanks again!

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.
Was your question answered? Please, mark a reply as the Accepted Answer.tick

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4 days ago

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NetGeekJay

Visitor

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4 Messages

5 days ago

Got excited that perhaps new 2050V firmware was available, but I'm on the same V10.01.03... still stuck at 40Mbs up. Oh well. Guess I'll get a CODA56 and try swapping to it, then back to the 2050V since I need those Voice breakout ports. If we were to ever have an extended AT&T 5Gbs/5Gbs Fiber outage, guess I could swap to the CODA56 and do without Voice for a few hours/days.

I'd much rather just use my 2050V and get the 300Mbs upload speed.

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NetGeekJay

Visitor

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4 Messages

Ha! The install the CODA56 modem (using Xfinity app to Add Device) and let that get all setup and show the 2100/300 really does work (actually getting 2150-2200Mbps down and 350-360Mbps up), and then swapped back to the 2050V and I'm still getting the 2100/300 AND I have my telephone plugged in like I need. I hope this is permanent! Though in reality, unless the AT&T Gig Fiber 5000/5000 up/down is having an outage (knock on wood, only been a couple times (back when it was 2500/2500) and great for last year+ at 5000/5000)... I don't need this as much as I need the phone line. If there is ever an extended AT&T fiber outage, then maybe I'll swap the CODA56 back in.

But instead... I just hope Comcast can make sure this is permanent and I don't have to worry about it! :-)

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1 day ago

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