Lost cell phone...

[Larry Gude]

Mine can use a few different methods, from my face to a pin or directional swipe code, or a single swipe, or none.

This one was one of those that had a puzzle/pattern you had to solve.

 

[glhs837]

This one was one of those that had a puzzle/pattern you had to solve.

My sons phone is set to that sort of thing.

 

[15007875]

Locked phone

Some phones and apps allow you to customize your lockscreen banner, so that you could put a phone number visible to anyone finding the phone, or an email. no need to unlock it, and they can find you easy.

It's built into JelllyBean, just did it on mine in about 30 seconds.

^^^ this is a must, all the family is set up that way.

Why lock your phone? How many accounts are tied to your phone.
Social Media, banks, shopping, ....