Router/modem with 2.4 frequency

@XfinityRichard​  Thank you for this response. The problem is that two of my devices require a 2.4 GHZ frequency. MyQ tech support (one device requiring 2.4 GHZ) says that many of these automatic multibanded router modems like the Xb8, will generally first try to connect at 5 GHZ, and if it can’t connect, it doesn’t try again at 2.4 GHZ. I have since purchased another product that says in multiple places I need to verify a 2.4 GHZ frequency. 

Does Xfinity provide another router modem that will support a 1 GB speed, but allow for band selection?

When I had a 300 MB speed plan, the older router modem had no issue with MyQ.

i feel like I am not making forward progress.

Even with our XB8 modem, while the default setting is to have the Wi-Fi bands combined to connect devices to whichever band the modem determines is stronger, you always have the ability to split your bands between the 2.4ghz and 5ghz directly through our Xfinity app at any time. I understand certain devices need to prioritize the 2.4ghz band to work, so this setting allows you to account for that.

@NoNoBadPuppy​ thank you for your comment. Yes, the gateway does support 2.4, 5, and 6 GHZ. The problem with the Xb8 router modem Gateway is that it automatically determines what is “best”. But I have two devices that require a 2.4GHZ frequency. I am told by the tech support at MyQ (one of the devices requiring 2.4) that the multibanded router modems will often start at 5 GHZ, and if it doesn’t connect, it doesn’t try other frequencies. So it can’t connect. I am told by Xfinity this Xb8 does not allow me to “force” a particular frequency. Hence my dilemma.