# Enable Lost Mode Enable Lost Mode on a device, which provides a message and phone number on the Lock Screen. ## Discussion While in Lost Mode, a device responds to invalid commands with error code `12078`. Refer to the following sections to determine supported channels and requirements, and to see an example request and response. ### Command availability ||| |--------------------------|----------------| |Device channel |iOS, Shared iPad| |User channel |N/A | |Requires supervision |iOS | |Allowed in user enrollment|N/A | |Required access right |N/A | ### Example request and response **Request:** ```plist Command Footnote Return to Acme, Inc. Message Lock Message PhoneNumber 408-555-555 RequestType EnableLostMode CommandUUID 0001_EnableLostMode ``` **Response:** ```plist CommandUUID 0001_EnableLostMode Status Acknowledged UDID 00008020-000915083C80012E ``` ## Topics ### Commands and responses [`EnableLostModeCommand`](/documentation/DeviceManagement/EnableLostModeCommand) The command to enable Lost Mode on a device, which provides a message and phone number on the Lock Screen. [`EnableLostModeResponse`](/documentation/DeviceManagement/EnableLostModeResponse) A response from the device after it processes the command to enable Lost Mode on a device, which provides a message and phone number on the Lock Screen. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)