These go to a different category - especially from software perspective as they are not open to user (although there seems some effort to make Google stay away): Bittium’s (another Finnish secure coms firm) Though Mobile 1&2. What I find interesting, are some of the HW decisions. Physical aspects are impressive (water and shock proof), but cameras are slightly lesser quality etc. But the main similarity (and reason to mention here): physical button to affect sensors: a “privacy mode” that (if I’ve understood correctly) reduces accuracies (may not turn them off?). Interesting idea to compare to.