Inside is a small button that needs to be pushed to unlock the door.
How to unlock a bedroom door that requires a key.
Some people swear by.
At this exact moment if the right amount of torque is applied you will be able to unlock a door without a key.
To unlock the door simply insert the key or other tool into the pinhole in the doorknob and push it straight in until you contact the release button.
You simply need a straight stiff tool to unlock it try a straightened paperclip or a small screwdriver.
2 push lightly on the handle of the screwdriver as you rotate the tool in small.
The pressure exerted on the bump key causes the key pins to push the driver pins above the shear line.