If I had to go WiFi-only, there would probably be hours-long gaps when I am unreachable. So my compromise is to use a non-KYC data-only SIM. Even if VPN is left off, it routes traffic first to a datacenter far from my actual location, and there is no longer a route for unencrypted calls and SMS and the associated spam. I don’t have a habit of streaming media on the go, so the data lasts quite a while and there isn’t much of an urge to use public WiFi.
Doesn’t fully eliminate the problem as IMEI is still sent and the cellular modem is still a rogue black box, but a step in the right direction. Knowing that the cellular modem can run whatever code with deep privileges as it wishes, I try to keep as little of my business on my phone as I can, with the bulk of my workflow centered around my laptop. Don’t get me wrong, I don’t think this automatically makes me immune, but I do think it’s a neat little exercise. Perhaps one could abstract the problem of the modem by getting a separate wireless hotspot.
My friends and family have accepted that they either need to get Signal, XMPP, or Matrix or I will be largely unreachable. The only remaining need for SMS and GSM voice calls stems from work, which is all handled by my work phone that is powered down, or at least disconnected, once I leave for the day. It sucks that this is not the norm, but it looks like I am quite fortunate that my friends, family, and employer all tolerate this workflow.
Take a look at “IoT” SIM cards, they’re a bit expensive and data-only, but might not be subject to the same KYC regulations.





Have been guilty of this when placing an online order, one time I simply forgot, the other time an obligation presented itself and I didn’t have time to go out of my way and pick it up. As for ordering at the counter and abandoning, IDK. Could be having to run for some urgent matter, but I’d agree it happens way too often to be just that.