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Because of smartphones, pocket TVs were never a thing.
(lemmy.world)
A "Showerthought" is a simple term used to describe the thoughts that pop into your head while you're doing everyday things like taking a shower, driving, or just daydreaming. The best ones are thoughts that many people can relate to and they find something funny or interesting in regular stuff.
Which is actually not smartphone, but a general purpose computer with cell internet connection that can be used for many things, one of those is actually calling.