Here are two options for a lost phone
or emergency situations that may prove useful. Both options
allow someone who has found your lost phone or found you in need
of emergency help. The first is for medical emergency and
requires a free app from the Google app store.
This app is used for
emergency if you cannot use the phone, or if it is lost. It puts
a little icon on the lock screen to get at the information you
provide, including an emergency call number.
LINK
The second is built
into Android phones and requires no app. It shows a scrolling
name and number of your choice on the lock screen, but still
preserves that the person cannot get past the lock screen and
into your phone. It only shows information you desire, but has
no medical information. Go to "Settings" then "device", then
look for "Lock Screen," "Security" and/or "Owner Info"
(depending on phone version). You can add any contact info you
want a person to call for emergency or lost phone (other than
your own cell number). It will scroll across the lock screen and
preserve that the person cannot get into your other information,
but can still contact someone to tell them the emergency, or the
fact that they found your phone.