Visitor

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3 Messages

Wednesday, February 11th, 2026 1:40 AM

On a new Xfinity Gig plan but upload speed capped at 40Mbps using Hitron CODA56

I'm on the Xfinity Gig plan. According to the plan, my upload is supposed to be up to 1Gbps. I'm still seeing 40Mbps upload speed. Searching through this forum, I'm assuming Xfinity needs to send some "update instructions" to my modem so the upload speed can be unlocked?

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Contributor

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227 Messages

16 hours ago

I'm not aware of any Comcast cable plans supporting 1Gbps upload.  Fiber can, but not cable.  On segments that have been upgraded to DOCSIS 3.1 upload you can get a few hundred Mbps upload.  I'm getting around 350Mbps up, and a bit over 2Gbps down.  40Mbps up sounds like your segment hasn't been upgraded yet.  Mine has.  A CODA56 supports DOCSIS 3.1 upload, but Comcast's end has to be upgraded too.  40 up is the most you'd get on segments that haven't been upgraded.

Visitor

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3 Messages

@zandor60657​ I’ve seen other posts on here discussing the fact that there is a special higher upstream boot file that needs to be applied to the CODA56 and only an Xfinity rep can do it.

Expert

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115.9K Messages

2 hours ago

Concern moved here to the Customer Service help section for greater exposure to Comcast corporate employees (The Digital Care Team) for assistance.

Official Employee

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2.9K Messages

2 hours ago

Hi there, @OddBallJones ! Thank you so much for reaching your Digital Care team. I appreciate your patience while you waited to connect with me. I'm sorry to hear about the slow speeds you are getting. Please be assured you reached the right person to assist you. Can you please DM me your first and last name, along with your full service address so that I can assist you further.-Richard

 

Please send a private message by clicking the direct messaging chat icon in the upper right corner of the page, click on the pen and paper icon, then enter “Xfinity Support” in the “To” section. 

Visitor

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3 Messages

@XfinityRichard​ I have just DM’ed you the information that you have requested.

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