How a message can help save your device on misplacement?
To use the same for this purpose, you will want using lock screen display message to display information for letting someone contact you for returning the phone. From your email deets, social media details, or some other preferred method for communication, there could be anything you want to display on the screen.
How to access the feature?
On the maximum Android phones, lock screen option for message is accessible from Settings> Display>Lock Screen within Lock Display. Depending on the phone manufacturer, the items on menu might be worded slightly differently. Check if your device allows this feature by searching for “lock screen message” on the Settings option’s search bar.