Just updated my Internet speed and it is slower now than it was before.

Do I need to do anything to the modem? I did turn off the modem and router, then restarted them. Nothing changed.

Sometimes even slower speeds. I had 400m and updated last week to 1000m.

Modem - MB8600

Router - ORBi RBR50v2

Thanks in advance.

Responses

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user_noname

Contributor

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168 Messages

1 year ago

@evak47 - Did you check my device info page prior to upgrading your speed tier? as MB8600 modem does not show up on my device info page for 1Gbps service tier.
Based on the most recent list of the approved CableModems, Arris MB8600 is approved for "Up to 949Mbps", that means the highest Tier you could provision that modem is 800Mbps and not 1Gbps.

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evak47

New Poster

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8 Messages

@user_noname -I would love 800 Mbps. With the 400Mbps service it was usually 200-250Mbps that it would show when testing the speed.

Even 600Mbps would be great !

Thanks for response.

1 year ago

0

U

user_noname

Contributor

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168 Messages

@evak47 - Try these steps if you wish it might point to where the issue might be - Answered: Tips for Troubleshooting your Xfinity Internet Connection

1 year ago

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BruceW

Gold Problem Solver

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26.3K Messages

1 year ago

... updated last week to 1000m. ... Modem - MB8600 ...

The MB8600 is not approved for Gigabit Internet service. It's approved for wired download speeds "Up to 949 Mbps".

See the "All Compatible Devices" link near the bottom of https://www.xfinity.com/support/devices (at the moment it points to https://assets.xfinity.com/assets/dotcom/projects/cix-4997_compatible-devices/2023.11.22%20Full%20List%20of%20Compatible%20Devices.pdf).

Realize that although Comcast calls some devices "Approved" and some "Recommended", for all but a few devices those designations only mean "approved/recommended for use with their Internet service", and not necessarily "approved for Gigabit".

AFAIK Comcast has never said how they provision devices operating on speed tiers they're not approved for. All I can tell you is that many customers who tried it have reported that they don't get full speed. There's a tendency to think the device will operate at the maximum speed it is capable of, but that doesn't seem to be the case.

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

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evak47

New Poster

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8 Messages

1 year ago

BruceW - Thanks for response. I was hoping to get 2X my 400Mbps service (actual 200-250Mbps) when I went to the 1000Mbps service.

Just wanted to make sure there wasn't something I had to tweek on the modem when changing service levels.

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XfinitySara

Official Employee

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1.7K Messages

1 year ago

Hey, @evak47! Just checking in to see if you still need any assistance. I see that you received a couple responses regarding your equipment, but our Digital Care Team is here if you still have any questions!

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evak47

New Poster

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8 Messages

Still has very poor speed. I was able to get 400+ yesterday, early morning, but then later that morning it was in the 100's.

I only got 124 just now. Why the difference? Seems about the same as when I had the 400Mbps service except I see a faster speed

once in a while.

Thanks for asking.

1 year ago

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XfinityChelseaB

Official Employee

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1.7K Messages

@evak47 ,If you could send our team a direct message with your full name, the name listed on the account (if different), and the service address associated with your account, I'd be more than happy to look into this for you. To send a Direct Message, please click on the chat icon in the top-right corner of the screen, next to the bell icon, and then type or select "Xfinity Support" to initiate a direct message.

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

1 year ago

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evak47

New Poster

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8 Messages

OK - Bought a new Arris S33 v2 modem (Xfinity recommended). Router plugged in 1 Gbps port. My speed is still the same 180-190 Mbps as the old modem.

Any ideas what I might try next.

Thanks in advance.

1 year ago

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XfinityThomasC

Official Employee

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2.5K Messages

Hello, @evak47

Are you attempting to increase your upload speed with a compatible Next generation speed tier device? The Arris S33v2 is not recommended. These devices are:

CommScope G54
Hitron Technologies CODA
Hitron Technologies CODA56

Netgear CM3000
Ubiquiti UCI

Also, has your area been upgraded to mid-split capability? Areas across the network have been receiving emails about free increases to their download and upload speed, but these increases are not the mid-split enhancement to the node.

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

1 year ago

0

Your Home Network

evak47

Just updated my Internet speed and it is slower now than it was before.

user_noname

evak47

user_noname

BruceW

Please be aware that there are 2 kinds of responses in this Forum: Replies and Comments. When you Comment on a post by scrolling down to "Comment on this post here...", I am notified of your response. But if you select Reply, I am NOT notified and may not be aware of your response.

evak47

XfinitySara

evak47

XfinityChelseaB

evak47

XfinityThomasC

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