There are three ways to unlock your bike: 

If your bike is connected to the app -  Tap the unlock icon in the app home screen to activate the unlock sequence. You will see a 5-second countdown on the Matrix Display and in the app. Roll the bike backwards or forwards before the countdown ends to unlock. You will hear the unlocking sound from the speaker. 

OR 

When touch-unlock and auto wake-up are enabled -  simply press the left handlebar button once to activate the unlock sequence. Then, roll the bike backwards or forwards before the countdown ends to unlock. You will hear the unlocking sound from the speaker. 

OR

If your bike is not connected to the app: Hold the left handlebar button down for 4 seconds until you hear a beep. Then, enter the first digit of your backup code (if the first digit of your code is 3, press the button three times). You'll hear a confirmation beep. Next, enter the second digit, wait for the beep, then enter the third digit. Roll the bike backwards or forwards before the countdown ends to unlock. You will hear the unlocking sound from the speaker.