There was a company that either tried and failed to launch, or did sell modular phones but it never caught on, and I think it was because they were ugly phones.
Probably just was too early. Hand phones have been Veblen goods, and still are to boomers, but its mostly past that stage in the product cycle
I funded them and got rugged. That probably had more to do with it. Phonebloks I believe it was called...
Huh. Maybe FOSS is the better route then