December 2018
Beginner to intermediate
328 pages
8h 29m
English
Depending on the device you are examining and its operating system version, you may need to delete different files. If the device contains *.key files under /data/system/, you need to remove these files; if there are no such files, you may need to remove locksettings.db, if possible, or update some of its records (see the next section).
Here is how to remove the files of interest via ADB:
adb shellsucd /data/systemrm *.key
Now the device should be rebooted. After the reboot, there will be no PIN or password.
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