To lock a bike, please press the Lock button on the app.
When the app tells you to press the orange knob down, go ahead and press the knob with your hand.
If you could not press it down, please disable Bluetooth and stop the app completely. Then press the orange knob down with your hand.
To check if the lock is secured, once the lock is locked, it should not let you pull it up unless you unlock it via the app.
On some locks, you should hear a beeping sound when it is locking after you press the knob down. Simply push the orange knob (on the lock) down to the other end of the lock. When you push the orange you should hear a beeping sound when it is locking. Wait until the sound stops and try to pull the orange knob up.