Abstract: A device property control system determines whether a current user of a device is an owner of the device, a trusted secondary user of the device, or an untrusted secondary user of the device. The system maintains device property values for the owner as well as each trusted secondary user of the device. When the current user of the device changes, the system determines whether the current user is the owner or a trusted secondary user and if so changes the device property values to those previously used by the owner or one of the trusted secondary users (whichever is the current user of the device). However, if the current user is an untrusted secondary user, the device property control system changes the device property values to demonstration mode device property values that are expected to best demonstrate the capabilities of the device.

Abstract: A device property control system determines whether a current user of a device is an owner of the device, a trusted secondary user of the device, or an untrusted secondary user of the device. The system maintains device property values for the owner as well as each trusted secondary user of the device. When the current user of the device changes, the system determines whether the current user is the owner or a trusted secondary user and if so changes the device property values to those previously used by the owner or one of the trusted secondary users (whichever is the current user of the device). However, if the current user is an untrusted secondary user, the device property control system changes the device property values to demonstration mode device property values that are expected to best demonstrate the capabilities of the device.

Abstract: A demonstration mode control system of a device receives and analyzes audio at the device. This audio includes, for example, a conversation between two or more users, such as an owner of the device and another (secondary) user. The system analyzes the conversation and determines whether a user intent is to have a secondary user of the device assess features of the device. In response to determining that the user intent is to have the secondary user assess the features of the device, the system automatically enters a demonstration mode for the device including running a demonstration program that highlights features of the device. The demonstration mode optionally includes changing device property values for the device to demonstration mode device property values that are expected to best demonstrate capabilities of the device.