How to Open Locked Door Knobs in a House
- 1). Open the locked doorknob with a screwdriver. Insert a small screwdriver into the hole in the center of the doorknob. Use the screwdriver to feel around inside the doorknob for a small slot into which the screwdriver fits. Then twist the screwdriver clockwise. This will cause the lock to rotate into the unlocked position, and the doorknob should be unlocked.
- 2). Unlock the doorknob with a paperclip. Insert an unbent paperclip into the hole in the center of the doorknob. Push the paperclip in until you hear a pop. Then the door should be unlocked.
- 3). Open the locked doorknob with a coin. Place a coin in the slot on the doorknob. Turn the coin clockwise to unlock the door.
Source...