I pin my Android screen before handing it over to strangers, and you should too

I was at a clothing store last year, looking for a specific jacket. The clerk couldn't find it, so I showed him a photo on my phone. He took the phone, told me he'd ask his manager if they had something similar, and walked to the back of the store with it. Anything could've popped up on that screen while he was back there, and I wouldn't have known.

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