A:AnswerAsk the seller from whom you are buying it. I don't know if Best Buy sells refurbished products, but I see on Amazon that some of their refurbished products have warranties.
A:AnswerThis particular model is wifi only so there is no lock / unlock settings. Those models with cellular will say they work with different carriers and typically just depends on the SIM card.
A:AnswerNot directly using Airdrop but you could email pics to yourself, or upload to google drive, dropbox, etc from your android tablet and then download them if you wanted them on the iPad for show n tell. There would be many ways to get them there with a little effort.
A:AnswerThe difference between this iPad and the iPad Air is the biggest difference is this one supports Apple Pencil and is cheaper brand new compared to the iPad Air.