Remove Android PIN

androidpinremove.txt

This method requires:
- Root access and debugging* enabled
- Reboot recovery and follow code:

*if debugging is not enabled it can be done from any custom recovery

adb shell
# sqlite3 /data/data/com.android.providers.settings/databases/settings.db
sqlite> update secure set value=65536 where name='lockscreen.password_type';
sqlite> .exit
# exit
adb reboot

ifabovenotworks.txt

adb push sqlite3 /data/local/tmp/sqlite3
adb shell
su
mount -o rw,remount /system
cp /data/local/tmp/sqlite3 /system/xbin/
rm /data/local/tmp/sqlite3
chmod 755 /system/xbin/sqlite3
sqlite3 -h
...
exit
exit
adb reboot

under_android.txt

adb root
adb remount
adb push sqlite3 /system/xbin/sqlite3
adb shell
chmod 755 /system/xbin/sqlite3
sqlite3 -h
...
exit
adb reboot