Sure, but since Qualcomm is never going to give anyone a license to use it and the lack of cleanroom means the provenance is somewhat uncertain, I think "dubio

Sure, but since Qualcomm is never going to give anyone a license to use it and the lack of cleanroom means the provenance is somewhat uncertain, I think "dubiously legal" is a perfectly acceptable description. It's not like I'm saying it shouldn't exist or anything. Just, be aware that the semiconductor mafia considers this part of their turf and wear some kneepads if you're going to make money with it.