Did I get a virus? (Galaxy S4, 5.0.1)

Question

I was just normally using my S4 when it restarted, and when it turned back on, it said Android is upgrading. The last time I saw this, I was notified of a software update, and I manually clicked install, IIRC. This time, it was sudden and unprecedented. I think this is a virus, though I don't know how I got it.


— superchampionoftheworld | Sources

Answer

— | Sources

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