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On iOS, you can quickly ditch the current FaceID/TouchID session, and require a passcode for the next unlock, by holding power and volume buttons simultaneously

On iOS, you can quickly ditch the current FaceID/TouchID session, and require a passcode for the next unlock, by holding power and volume buttons simultaneously for several seconds until the "power off" screen appears.

ortusdux 3y ago
The only similar thing I know of on Android is that 4 failed attempts with an unknown finger disables fingerprint unlock. So I can lock my phone out in a few seconds using my middle finger.
- modeless 3y ago
  In the power menu next to "power off" there is "lockdown".
- thallium205 3y ago
  Android had lockdown mode but it has to be enabled. https://www.androidcentral.com/apps-software/how-to-disable-biometrics-on-your-android-phone-from-the-lock-screen https://www.androidcentral.com/apps-software/how-to-disable-...
- rezonant 3y ago
  > So I can lock my phone out in a few seconds using my middle finger. This is perhaps off topic, but does this mean you put your phone in your pocket with the screen facing outward? I do the opposite, am I weird? EDIT: I suppose maybe you meant when the phone was on a table or something
  - ortusdux 3y ago
    My fingerprint reader is on the back of my device.
simongr3dal 3y ago
How long before some court declares such practice equal to evidence tampering or obstruction?
- toomuchtodo 3y ago
  Between now and if that happens. Works today though!
- cryptonector 3y ago
  IANAL. But I believe it's not that easy. First it would have to be a foregone conclusion that you had contraband on your phone before merely locking it could be construed as obstruction. Then they'd have to demonstrate that you locked the phone at a time when you had reason to believe that you might be coerced to unlock it because it was a foregone conclusion that you had contraband. Are those likely circumstances? Probably not, though it will happen to someone, sometime, but when it does it will be because they did something stupid or because the cops overstepped their authority (in the latter case the process is the punishment, and it wouldn't be the cops getting punished).
- generalizations 3y ago
  That's probably why it's also triggered by shutting down/rebooting the iphone, which has plausible deniability.
- tzs 3y ago
  iPhone periodically disables biometrics until you enter your passcode. They aren’t going to be able to prove that the reason the phone is asking now isn’t that.
bombcar 3y ago
If you trigger the side lock button enough to get emergency SOS it also cancels the current session.
- deleted 3y ago
  [deleted]
letmeinhere 3y ago
Android, or at least Pixel, similarly has a "Lockdown" mode, reached by long-pressing power. Unfortunately I think you do need to enable it in advance.
deleted 3y ago
[deleted]
compootr 3y ago
I just use a long pin it's kinda a fun trick when I'm showing people something on my phone and need to unlock it :)
wil421 3y ago
All you have to do is press the power button in rapid succession. No need to hold the volume on my iPhone 14.
tzs 3y ago
A couple things to note: 1. Check your “Emergency SOS” settings. It is possible to set it so that holding down those buttons like that initiates a countdown to an emergency call. Depending on the exact settings this may also be accompanies after a few seconds with a loud alarm. If you are trying to surreptitiously disable biometrics this might be irksome. 2. I think these procedures were different on earlier phones or iOS versions, so test it out. 3. It also works to click the power button rapidly 5 times. That too can be set in the “Emergency SOS” setting to trigger an emergency call so check that before using it.
- altairprime 3y ago
  Holding power-volume-up for a second to reach the “power off?” screen is enough to kill Touch / Face ID instantly, at which point you can let go without having fired an alarm (unless you’ve gone and altered your alert settings, so test this when a loud noise won’t endanger you).
dzhiurgis 3y ago
FaceId would be hard to force - you can close eyes or make a shocked face and it wont work. Unless they drug you to oblivion.
- hypothesis 3y ago
  There was a recent TV show where someone got shot and killed just so that bad guy could grab the phone and unlock with FaceID. It worked in the show…

ortusdux 3y ago

The only similar thing I know of on Android is that 4 failed attempts with an unknown finger disables fingerprint unlock. So I can lock my phone out in a few seconds using my middle finger.

modeless 3y ago
In the power menu next to "power off" there is "lockdown".
thallium205 3y ago
Android had lockdown mode but it has to be enabled. https://www.androidcentral.com/apps-software/how-to-disable-biometrics-on-your-android-phone-from-the-lock-screen https://www.androidcentral.com/apps-software/how-to-disable-...
rezonant 3y ago
> So I can lock my phone out in a few seconds using my middle finger. This is perhaps off topic, but does this mean you put your phone in your pocket with the screen facing outward? I do the opposite, am I weird? EDIT: I suppose maybe you meant when the phone was on a table or something
- ortusdux 3y ago
  My fingerprint reader is on the back of my device.

simongr3dal 3y ago

How long before some court declares such practice equal to evidence tampering or obstruction?

toomuchtodo 3y ago
Between now and if that happens. Works today though!
cryptonector 3y ago
IANAL. But I believe it's not that easy. First it would have to be a foregone conclusion that you had contraband on your phone before merely locking it could be construed as obstruction. Then they'd have to demonstrate that you locked the phone at a time when you had reason to believe that you might be coerced to unlock it because it was a foregone conclusion that you had contraband. Are those likely circumstances? Probably not, though it will happen to someone, sometime, but when it does it will be because they did something stupid or because the cops overstepped their authority (in the latter case the process is the punishment, and it wouldn't be the cops getting punished).
generalizations 3y ago
That's probably why it's also triggered by shutting down/rebooting the iphone, which has plausible deniability.
tzs 3y ago
iPhone periodically disables biometrics until you enter your passcode. They aren’t going to be able to prove that the reason the phone is asking now isn’t that.

bombcar 3y ago

If you trigger the side lock button enough to get emergency SOS it also cancels the current session.

deleted 3y ago
[deleted]

letmeinhere 3y ago

Android, or at least Pixel, similarly has a "Lockdown" mode, reached by long-pressing power. Unfortunately I think you do need to enable it in advance.

deleted 3y ago

[deleted]

compootr 3y ago

I just use a long pin it's kinda a fun trick when I'm showing people something on my phone and need to unlock it :)

wil421 3y ago

All you have to do is press the power button in rapid succession. No need to hold the volume on my iPhone 14.

tzs 3y ago

A couple things to note: 1. Check your “Emergency SOS” settings. It is possible to set it so that holding down those buttons like that initiates a countdown to an emergency call. Depending on the exact settings this may also be accompanies after a few seconds with a loud alarm. If you are trying to surreptitiously disable biometrics this might be irksome. 2. I think these procedures were different on earlier phones or iOS versions, so test it out. 3. It also works to click the power button rapidly 5 times. That too can be set in the “Emergency SOS” setting to trigger an emergency call so check that before using it.

altairprime 3y ago
Holding power-volume-up for a second to reach the “power off?” screen is enough to kill Touch / Face ID instantly, at which point you can let go without having fired an alarm (unless you’ve gone and altered your alert settings, so test this when a loud noise won’t endanger you).

dzhiurgis 3y ago

FaceId would be hard to force - you can close eyes or make a shocked face and it wont work. Unless they drug you to oblivion.

hypothesis 3y ago
There was a recent TV show where someone got shot and killed just so that bad guy could grab the phone and unlock with FaceID. It worked in the show…