A method is described as implemented in a mobile device having a lock screen wallpaper, where the mobile device maintains a profile storing authentication data associated with both a primary user of a mobile device and one or more secondary users that are authorized to use the mobile device. When the mobile device is at a business location, the secondary user(s) are non-intrusively authenticated as authorized user(s) of the mobile device. Upon successful authentication a scanning code is displayed over a lock screen wallpaper of the mobile device, where power is conserved in the mobile device by providing the scanning code to the secondary user(s) without unlocking the mobile device.