Visitor

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5 Messages

Wednesday, April 15th, 2026 12:32 AM

Closed

Slow upload speed after upgrading to 2GB/sec and XB8-T modem-Looking for help

I just upgraded my internet speed to 2GB/sec with a stated 217MB/sec upload speed and the XB8-T modem. I have performed about 30 speed tests today, all close to: download 892Mbps and upload 38.9Mbps on a MacBook Pro M1 Max plugged straight into the modem using ethernet. I upgraded both get the higher upload speed for managing cloud backups for a photography business. Over Wifi the upload speed is measuring 23 Mbps. I am looking for some assistance in achieving that higher upload speed or else these upgrades were for naught.

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Visitor

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5 Messages

3 days ago

Actually, here is what Xfinity broadband facts for my location says:

Speeds Provided with Plan
Typical download speed
2278 Mbps
Typical upload speed
293 Mbps

Official Employee

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2.7K Messages

2 days ago

Thank you for reaching out to our team here. I will be happy to look into any issue with the speed on your service. Have you already run through the troubleshooting steps on the Xfinity app and went through a modem reset? - XfinityJohnG

Visitor

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5 Messages

Hi JohnG,

Yes, I have had two chats with customer support, in addition to doing to troubleshooting steps. They activated the modem again after a reset (said it wasn’t activated in the billing system) but that did not improve the upload speed. The upload never goes over 40mbps so it seems like a cap is in place. 

Official Employee

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2.9K Messages

 

brittnclay Let's dig into this a bit more to see what is going on. Please send a Direct Message with your full name and address. Here are instructions on how ot send a DM in case you need them:

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  • Click the "Direct Message" icon (upper right corner of this page)
  • Click the "New message" (pencil and paper) icon
  • Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list
  • Type your message in the text area near the bottom of the window
  • Press Enter to send your message

 

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Visitor

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5 Messages

Thank you for reaching out. The onsite technician got this resolved. 

Official Employee

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4.8K Messages

This is fantastic news, Brittnclay, thanks for updating us. Please be sure to reach back out to us for any future concerns. We're always here to help! Thanks for being the best part of Xfinity. 

 

(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

Expert

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117.4K Messages

1 day ago

@brittnclay @XfinityBenjaminM 

Please circle back here and post any possible solutions for the issue here in these open public forums so that all readers here may benefit from the exchange / info. This is in keeping with the spirit for which these public help forums were originally intended. Thank you.

Visitor

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5 Messages

8 hours ago

An Xfinity technician had to physically connect to the XB8 router and push a new boot file. The Xfinity system was also holding me on my prior plan until he closed the ticket. As soon he closed the ticket, I got the speeds of my plan. 2.4 gbps download and 292mpbs. Speeds varied but were consistently a little lower during the day, but was still getting over 200 mbps. 

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