A mobile device is configured to control power consumption. The mobile device includes a detector configured to detect at least one of an active input or a passive condition, where the passive condition is based on a comparison of a device state or a change in the device state to a threshold. The mobile device includes a controller configured to respond to the detected active input or passive condition by causing less than all components in the mobile device, including the display screen of the mobile device, to enter a sleep mode directly from within an in-call mode. An amount of power supplied to the display screen is reduced in the sleep mode. The operational modes of the mobile device include the sleep mode and the in-call mode, and the mobile device is configured to consume at least 4% less power in the sleep mode than in the in-call mode.