Whenever I change my lock screen photo I always put it in a image editor, or even one of the Meme generators will work, to place return/ reward info on the picture.
I put pertinent return info ( cell and office phone with email ) on the lock screen picture.
On my BlackBerry I can easily create a message that shows on the lock screen.
Also inside my iPhone case I placed a simple business card and 3m sticky note pad to the back of the phone.
On my other phone since I carry it in a holster I place that sticky inside the battery cover.
You wouldn't believe the phones I come across without any means to locate the owner, most of them locked mind you.
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