To lock a Social Bicycle, remove the U-lock from the holster and insert it into the LockBox carefully until the bar clicks into place. Pull the U-lock back to make sure it is securely locked, and double check that the bike indicates it is ‘locked’. If it is not properly locked, the screen will flash red and as you to "Lock the bike". Once you have securely locked the bike, the screen should flash green and say "Thank you".
Always be sure to lock the bike to an approved fixed object (consult your local program rules).