Finally, Android also has a way to leave some contact information on the lock screen for those who might find your phone and want to return it. From Settings, tap Users then Emergency information. Here you can add any of your own info (name, address, blood type) as well as one or more contacts from your address book. As on iOS, these details are accessible to anyone from the emergency dialer part of the lock screen. To leave a simpler, one-line lock screen message, go to Settings, Security, and tap the cog icon next to Screen lock.