Put your information on the lock screen (Jelly Bean)
If you've ever found someone’s lost phone, you know
that it can be a hassle to try to get it back to him or her. Most times, you
just have to scroll through their address book for a hint of how to contact
them (or one of their family members). Android 4.1 and 4.2 users have the
option to make things a little bit easier for potential do-gooders. They let
you post your contact information on the phone's lock screen. From the Settings
app, tap "Security" and look under the "Screen security"
section for "Owner info." Tap that, and you'll be able to enter a
name, email address, phone number, or any other appropriate info that will show
up on the phone's lock screen.