iPhone Button Combo to View Owner Info?
You can tap on the Emergency button on the iPhone lock screen to access Medical ID. If a user has set Medical ID and has enabled it's display on the lock screen, the owner information can be obtained.

Here's how you can access it as well as set it up.


Suppose you found a random iPhone and attempt to unlock it. After failing to authenticate via Touch ID/Face ID, the iPhone would present you with the lock screen. It would look somewhat similar to this:


Tap on Emergency and it would take you to the Emergency Call screen. If the owner has already setup Medical ID, it would be shown in the bottom left corner.


You can tap on the Medical ID button to view the owner info. Important identifying information such as owner name, photo, height etc. along with Emergency contact numbers can be accessed if set.


If you wish to set the Medical ID information for your own iPhone and want the same to be accessible via the lock screen, go to Settings app → Health → Medical ID and tap Edit to provide your information. Once done, enable Show When Locked under Emergency Access.