I have one too and I like it. It's small, reliable and cheap.
I did see somewhere some time ago that someone made a joke about people with flip phones. They said we're either poor (kinda me) or time travelers. lol
The metal box thing would work but you'd need to electrically ground the box to be sure. A plugged in but NOT OPERATING microwave should work, too.
Most Americans aren't aware/couldn't even grasp how HUGE Samsung is. Their product lines are unbelievably huge but we only see their consumer electronics. They're a massive conglomerate.