I read this question and immediately started craving a diet coke lol

Garmin would work and isn’t iOS or Android based

For me, this wasn’t too hard. Cheese on the other hand…that will be a challenge

You don’t really have a choice

Store a jpg of the country’s flag as binary

Pretty easy yes for me.

In both cases he’s free, I’d rather the truth come out.

Yeah with your own player and format you could do whatever you want

I probably wouldn’t for a while. I’d try my best to blend in and work my way into a position of power using all my knowledge. With the rise in education and general knowledge shared today, just knowing so much might even be a giveaway…so I’d have to be careful. Then id try to make the world a better place. But in the end it would probably be worse off via some unintended consequences.

Or create an electric turbine and motor with some copper and magnets, then show it to some guy in a bar and say I’m from the future.

Anarchy!