I have forgotten the PIN of a device but I do have access to a root shell with adb shell and su

Is there some way I could remove the screen PIN lock or change it?


if your device is not encrypted with login credentials you can delete locksettings.db

adb shell su -c "rm /data/system/locksettings.db*"

However, bear in mind the following files are required for FBE encryption. If you delete these files you won't be able to decrypt userdata partition, all data is lost


The big axe

A brute force solution existed as I had access to fastboot too.

To remove the PIN, removed the entire userdata partition with fastboot

fastboot erase userdata

as described here: https://android.stackexchange.com/a/175887/320098

  • To wipe the entire partition is pretty brute force to be - it removes everything – Simson Apr 27 '20 at 10:45

@alexcs solution can work without root / su (sorry I can't comment on his answer) :

adb reboot recovery

(wait for reboot)

adb shell rm /data/system/locksettings.db

and reboot into normal mode with :

adb reboot

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