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user_66femf
1st Topic

Visitor

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1 Message

Friday, May 23rd, 2025 7:48 PM

2100/300 plan -- Ubiquiti UCI Sees 2100 down consistently, but only 40 up

My plan is 2100 Mbps (down)/ 300 Mbps (up).

My modem is customer owned and is an Xfinity-supported model (Ubiquiti UCI).

https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2023.09.25%20Full%20List%20of%20Compatible%20Devices.docx-%20vF.pdf

I consistently see 2100 Mbps down.

However, I only ever see 40M Mbps upload.

It appears that others (https://forums.xfinity.com/conversations/your-home-network/ubiquiti-uci-nextgen-x2-only-40mbps-upload/678be8b9ec3cb6282638d323) have had similar issues and been able to get it resolved.

What can I do to get help checking whether my modem is properly provisioned for the speed tier I'm on, including upload speeds?

Thanks.

Question

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Updated 

12 days ago

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XfinityThomasD

Official Employee

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1.3K Messages

20 days ago

 

user_66femf Thanks for posting on our Community Forums. One thing to consider from the list of compatible devices is that the next-gen section at the top of this list would show devices currently compatible for both download and upload speeds. We can look further into the address, modem provisioning, and signal reports to make sure everything is being coded correctly. Please send our team a direct message with your full name and address.
 
To send a Direct Message:

 

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  • The "To:" line prompts you to "Type the name of a person". Instead, type "Xfinity Support" there.
    • As you are typing a drop-down list appears. Select "Xfinity Support" from that list.
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  • Type your message in the text area near the bottom of the window
  • Press Enter to send it.

 

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doomslayer

Visitor

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1 Message

12 days ago

Are you using an SFP+ to RJ-45 adapter?

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