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Xfinity Claims S34 is S34v1 Won't Do Higher Upload Speed

  • November 6, 2025
  • 1 reply
  • 44 views

Hi. I’m being pulled around by Xfinity support telling me I cannot receive higher upload speeds since my S34 is actually S34v1 that has not been certified by Xfinity. I can find nothing relating to S34v1 versus S34. Xfinity will not provide me any documentation of their claim.

 

Is Xfinity telling me the truth?

Best answer by SURFboard Moderator

There are no separate versions of the S34, and version numbers do not indicate different configurations. The S34 has always been approved by Xfinity.

For your reference, please use the link below to view the list of Xfinity-approved modems.

https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2025.03.25%20Full%20List%20of%20Compatible%20Devices.pdf

 

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1 reply

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There are no separate versions of the S34, and version numbers do not indicate different configurations. The S34 has always been approved by Xfinity.

For your reference, please use the link below to view the list of Xfinity-approved modems.

https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2025.03.25%20Full%20List%20of%20Compatible%20Devices.pdf