I wish there was another choice of mobile + accessories that was both privacy respecting and actively using open standards for the betterment of all, not just their own profits.

That's the rub. If you look at Android handset financials, there's almost no money in making Android phones unless the company making them is Samsung, and only certain models sell. Where are all of these profits going to come from?

I wonder if you'd get farther with a USB SIM adapter under desktop Linux in that regard. I think you'd be hard pressed to end up where you want to in anything more portable than a laptop, since phones themselves are designed to be glorified containers for your mobile ad ID.

https://en.wikipedia.org/wiki/Advertising_ID