Fauxx is an open-source Android privacy tool that poisons data broker and ad-tech profiles by generating continuous, plausible, off-demographic synthetic activity from your device. The goal is simple: make your real behavioral signal statistically indistinguishable from noise.
Not my project, but though this is really cool and worth sharing.
Thanks! Now I think that when you said “card is online” you meant the SIM card, not credit card. I use an alternative OS that, as I understand it, does a little to offset the tracking but it is, indeed, outside of my scope! I mostly have my phone on airplane mode, even away from home, but of course not always. I do know that this OS eliminates the ability for the phone to call home when on airplane mode.