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my issue is when i try use Google services that Allow remote lock and factory reset. if the mobile stolen, then i want to try it and i locked my personal phone successfully it locked by password when i open my device password entry screen appear and when i write the password that i requested from web the device open but i want to remove this lock and i cannot do it, i locked the phone by using Android Device Manager through this Google link

Thanks in advance for help.

marked as duplicate by Izzy, bmdixon, Dan Hulme, ale, eldarerathis Nov 2 '14 at 19:31

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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If adb is detected , Try removing data/system/locksettings.db file and reboot

Following are the detailed steps :

  1. adb shell
  2. su
  3. cd data/system
  4. rm locksettings.db
  5. rm locksettings.db-wal
  6. locksettings.db-shm
  7. reboot

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