Thank you for your reply.
I'll call Xfinity support again and not take no.
I'd rather not go through the hassle of a new router.
Also check into the 5ghz Wireless Channel settings and make sure you are using a compatible channel (36-48, or 149-161) so you have the option of using your 5ghz band as well. Just use you Xfi app or login to your router admin portal to make the necessary changes.
To login to your router, go to any web browser and type in the address bar http://10.0.0.1
Then enter your username and password. (default is admin and password). Look under the 5 ghz Wireless Settings and select "Edit." (Gateway/Connection/Wifi/5ghz)
https://www.xfinity.com/support/articles/wifi-change-admin-tool
https://www.xfinity.com/support/articles/change-wifi-channel-admin-tool
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Depending on your router model number, may need to use the Xfi app to make changes rather than logging in to your router. For some models, need to call Xfinity to make any requested changes.
Right now the channel on the 5ghz is set to 36. Should I change it?
I'm on the phone with with Xfinity. The agent is saying they can't change the 802.11 g/n to 802.11 b/g/n.
At this point are there any other solutions, besides finding a new provider?
Also, within the 5 GHz, the Channel Bandwidth option is set to 20/40/80. Is that setting okay?
Also, what should the Mode be set to for 5GHz?
Currently, I have it set to 802.11 a/n/ac.
I just finished my call with Xfinity.
The agent said to go to a local Comcast store and get a new router since I've had my router/modem since 2017.
My question is, would a new router/modem actually make a difference? I don't want to waste the time if it's not going to help.
What is the model number of the router of the router you currently have? Look for sticker on side or bottom.
Some of the older routers are still configurable by user. The newer routers will almost certainly have b protocol disabled in their firmware.
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As for your 5ghz settings, they look fine as you reported ch. 36, n/AC. You can certainly try another compatible channel, but don:t think that is issue.
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Try going into router settings and either changing the SSID password to something very easy (no special characters) or leave the password empty (creates open network). Let's rule out a password issue with this step.
Change the password for both the 2.4ghz and 5ghz bands. (Or leave blank while troubleshooting). Then Restart the router. Then go to your Roku device and Reset Network Connection under Settings/System/Advanced System Settings/Network Connection Reset/Reset Connection.
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Personally, I would purchase my own router and tell Comcast/Xfinity to jump in a lake. Especially if you are leasing a router from them and they are refusing to configure it to work with the devices on your network.
