Embarrassing admission to kick off this thread. Yesterday I went for a jog on Bodmin moor. Phone in one hand running the stop watch, water bottle in the other hand. Single car key in my pocket. When I finished my car key was hooked into the lining of my pocket, so I put the bottle and phone on the roof while I untangled it. Of course the bottle then rolled off. So as as you will of guest by now, when I drove off a few minutes later, the phone was still on the roof.
So after blocking the SIM card this morning, and being told it could take 24 hours before it would take effect, I was delighted when Mrs G phoned home from work to tell me the finder had just called her. So all is now arranged to pick it up again in an hour or so.
So to the thread title. When I'm jogging and using the stop watch I disable the security pin on the phone , because it is a pain. As a result and because I didn't report it until today, the finder was able to obtain my wife's number and call her. If not I'm sure I would never have seen the phone again.
So should you lock your phone?
PS. I would add I don't use my phone for any financial transactions. But obviously my pictures and contacts are on there.