Can a lost Iphone 6 be somehow restored and used after its reported lost?

Hypothetical scenario: David finds an iphone 6 on the street. Although he could be the better man and figure out a way to return it, he is in need of cash and goes by the quote "Finders keepers losers weepers" and decided to keep it.

Is there any way to hack/restore an iphone 6 so it can be used?

Will my Dropbox photos still be saved on my account if I reset my iPhone?

I'm about to do a complete reset on my iPhone, I just wanna see if my photos will still be saved.Their not saved no iCloud, and their not backed up on my computer, but I have them all saved in the Dropbox app. If I download the app again, and log back in to my Dropbox account, will my photos still be there?

How to remove Iphone passcode? - 1

Recently I broke my Iphone 5C and got another phone. I logged into the icloud and all the recent stuff that I had saved onto my broken Iphone 5c in't in the icloud because I didn't have enough storage to do a backup. Well I tried to do a backup on itunes but it won't because my iphone needs to be unlocked but the screen is broken so I can't get into it. I've tried to look up how I can remove the passcode but most will result in losing all the stuff I have in the phone already. How do I remove the passcode without losing any stuff?

Scary IPhone message pop up

I tried watching age of ultron free and this pooped up, I eventually escaped but what does this mean and is it true? What do I do if it is?! Scary IPhone message pop up Help - 1

Why is my iPhone 5s getting warm/hot?

Recently, my iPhone 5s started getting warm and occasionally hot when I use it. I'm trying to find the source of the problem. It began by getting warm/hot when I would charge it, and then my charger stopped working, and I had to buy a new one. I also got a storage almost full alert, but my friend's storage is full, and her phone doesn't get warm/hot. It immediately cools down within a minute of turning it off. I have only 5 apps that aren't the ones that initially come with the phone; the only one I use quite often is Tumblr. Do you have any idea what might be causing it?

Added (1). The phone heats up after very little use and hasn't been left in any hot areas.
I haven't used the new charger yet, but it is not an Apple one (but the one that broke was an Apple one).

Can I connect an IPhone 6 plus for metro pcs?

I wanna get the iPhone 6 plus probably from best buy somewhere cheap, and I have metro pcs and i wanna stick to metro so Can i connect it there? Will they charge me more for every month? Can I still have the same phone number?

My selfie stick isn't working?

I bought a cable take pole for my iPhone and it does not work. It's a plug in selfie stick so I plugged it into my headphone jack and it won't work.