this post was submitted on 24 Jul 2026
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this was a streisand effect for me because i didn't have duress password set up on my grapheneos phone (security & privacy => device unlock) before but i do now! :D
On GrapheneOS, you can also set a "second factor PIN" in the unlock settings under "Fingerprint Unlock", so that to unlock your screen you need to first use the fingerprint unlock and then separately enter your PIN. This means BOTH are required every time you unlock. Your phone can't be unlocked unless it's your finger AND unless you enter the PIN that only you know.
And under the Screen Lock settings you can also enable "Scramble PIN input layout", so that the number buttons on your unlock screen will be out of order, so people watching you or recording you can't just make note of the shape your index finger is making when touching the numbers to unlock your phone(like people looking over your shoulder or recording on store security cameras).
What I find foolish is there's no pin only to unlock (no biometrics), but biometrics available when unlocked
Plenty of my apps have biometric verification I'd love to take advantage of, but I don't need or want one to unlock the phone itself
But there is
Settings > Security & Privacy > Device Unlock > Fingerprint and there you can toggle to use the fingerprint for device unlocking and/or verification in Apps
Huh cool
That definitely was not there when I installed GrapheneOS