Five real devices in one house today: iPhone, iPad, Pixel, Samsung tablet and a Doro phone designed for older and visually impaired people.
With five present, the profiles appeared. Turn one device off and the remaining four returned to quiet mode—the identities disappeared. Turn it back on and the group reopened quickly.
Three difficult days of privacy work became visible in one very simple test.
The Doro also exposed an accessibility problem in onboarding. A useful reminder: privacy only matters if the person holding the phone can actually use it.