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All this is implying is that they are capturing this data anyways and offering you a peek at it for money with the guise that its for your safety.
There is likely no way for you to shut it off tracking you everywhere in your own home unless you pay them to access the settings for this feature.
They likely can track you behaviors with this and know when you take a shit, when you jerk-off/fuck your spouse, when you watch media, etc using machine-learning on the wifi specrum of your locations, signal shape, and duration.
Fuck this crazy invasive shit to piss.
Ask for just a plain modem and buy your own WiFi router. If that isn't an option, disable the routing functions and turn off the WiFi and buy your own router.
You cant use xfinitys fastest internet plan without using their hardware these days.
Yeah, they used something like fluctuations in the WiFi signal, so you can turn it off. I suppose they could broadcast secretly without an SSID, but there are apps that will show it, so I doubt they would.
They can also see more than just movement: https://www.popularmechanics.com/technology/security/a42575068/scientists-use-wifi-to-see-through-walls/
They would have to have access to the wifi piece specifically, so asside from them hacking the router, which is unlikely..
It makes it a lot less likely.
I haven't had a provider supplied modem or router in well over a decade. Not everyone has the know how to do this but it's not hard to learn and they should learn.
How hard it'll be depends on the provider. My provider's customer support explicitly told me that it is technically allowed but it is their policy to offer absolutely no help with that whatsoever for "liability reasons", and I'd be on my own if I got my router stuck in a misconfigured bridge mode where I can't access any settings anymore to fix things. They also told me to find my subscriber credentials on my own if I wanted to use a 3rd party modem.
My provider offers no help for it past the Dmarc either.
For the average person it's just plug and play or a guided setup. Most folks won't ever need or make any customizations to the setup.
For what you're talking about, that can be more difficult. I work in IT so not only do we have our own modem and router in place but I also run a home server setup.
Please, everyone:

This tech is still relevant in 2025?
What tech? Wifi?
I thought OpenWrt was kind of dead. Everyone uses pfsense as their open source router.
IMO, pfsense is for if you want to use an x86 PC as a router, while OpenWRT is for if you want your ARM-based commodity home router to run open source firmware.
it's not just for routers. you can (and should) use it on your access points.
I have six APs in my house for 100% WiFi coverage inside and outside my home.
Iβm actually so incredibly lazy I use a firewalla purple. And I love it. Youβll never take it away from me! Hiss!!!!
With only one payment you can allow us to invade your privacy... Even more than we already do.
Pretty sure itβs, βwith one more monthly payment, we will give you some insight into a small price of information we already know β
Any open source implementations of this?
Yeah this has been around for some time now, here's a paper on the implementation of it.
I'm guessing it assumes you're carrying your phone and infers motion from changes in the signal?
Or just uses the phone connecting and disconnecting to signal departure and arrival, in which case Home Assistant has done that for awhile now.
Reminds me of The Dark Knight when Batman activates something similar using cell signals.
We really ought to stop fucking creating the Torment Nexus, jfc.
Help us map your home and your habits. You can reject this free offer for $9.99 dollars per month. Terms and conditions apply.
So I guess those directional MIMO arrays can now give information back to the host controller. That is kinda creepy but also it could be super useful in the right circumstances.
Device-free passive localization has been around for over 15 years.
So when's it gonna be in Home Assistant?
The idea of DfP has been around for over 15 years but its only recently become possible outside of a laboratory environment. It isn't in HA yet because no one has bothered to write a module for it and there's almost no WiFi gear that supports it; either natively or through exposing the data necessary to make it work.
Hmm, maybe they need to build it into OpenWRT first, then.
Either way, the bottom line is that it's completely unacceptable to exist as a feature unless it's 100% Free Software and running 100% locally.
She kinda bad tho

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