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brittnclay
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Wednesday, April 15th, 2026 12:32 AM

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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6 hours ago

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brittnclay

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2 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

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XfinityJohnG

Official Employee

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2.7K Messages

23 hours 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

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brittnclay

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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. 

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18 hours ago

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XfinityBenjaminM

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:

 Click "Sign In" if necessary
  • 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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13 hours ago

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EG

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117.4K Messages

6 hours 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.

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