Blocking trackers by depriving them of internet?

@Ludix My family and I are pretty mobile, so I need a solution that will work anywhere, not just at home, so pihole is not for me, although I enjoy reading about it.

@piero I re-read my response - I apologize for my rudeness. I’m planning on looking into Blokada and Trackercontrol a bit more before renewing my VPN subscription in a year or so. For now, though, I’m looking for something that I can “set and forget” for my wife’s phone and son’s phone, rather than adding yet another app that needs me to keep an eye on it.

I’m really hoping that this quote from tve’s post from 6 months ago is effective:
#3 can be done in the settings: Settings->apps-> ->Data usage->deactivate all data sliders”

Can someone with knowledge or experience confirm for me that this would actually, completely work? i.e., there is not some other additional channel that trackers in the data-slider-deactivated app can use to call home/send my info elsewhere?

Thank you. Sorry for being unclear.