Not that this is a good solution, but it is a semi-practical countermeasure: mashing the power button 5 times on an iPhone disables all biometrics immediately, starts an audible siren countdown, and calls 911 if not dismissed. Holding power + volume up for a few seconds disables biometrics silently. I long ago enabled the "10 failed logins in a row deletes the phone" toggle.
edit: There are two ways to disable biometrics for post-iPhoneX models, which are described above. Pre iPhoneX, there is no panic-mode-with-a-siren, but 5 clicks of the power button will disable biometrics.
I routinely do this before i go through the TSA complimentary-preflight-massage line, when i'm within about 50 miles of the mexico border, and whenever i'm pulled over at a traffic stop.
and i'm not even doing anything particularly interesting.
At least this case involved An Actual Warrant. It's not the best, but it's a whole lot better than the no-warrant scenario.
edit: There are two ways to disable biometrics for post-iPhoneX models, which are described above. Pre iPhoneX, there is no panic-mode-with-a-siren, but 5 clicks of the power button will disable biometrics.
I routinely do this before i go through the TSA complimentary-preflight-massage line, when i'm within about 50 miles of the mexico border, and whenever i'm pulled over at a traffic stop.
and i'm not even doing anything particularly interesting.
At least this case involved An Actual Warrant. It's not the best, but it's a whole lot better than the no-warrant scenario.