How To Remove Forgotten Pattern

• you need custom recovery (rooted mobile)
  
• Reboot to recovery
  
• Delete these files
  
  /data/system/locksettings.db
  /data/system/locksettings.db-wal
  /data/system/locksettings.db-shm
  
  
• Reboot system

P.s.s

• By adb debugging
  
• Type in :
  
• adb shell
• su
  rm /data/system/locksettings.db
  rm /data/system/locksettings.db-wal
  rm /data/system/locksettings.db-shm
• reboot
  
• Enjoy

;)

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