Hi Rys,
From the picture you posted, it's obviously an iPhone 6S; the inside of the 6 looks almost identical, but the placement of the display connectors confirms that it's a 6S - or started life as one, anyway.
Someone has mounted two extra circuit boards over the iPhone's logic board, for what purpose I can't even guess. The lower board appears to be there for the purpose of adding an extra connector of some sort, but I can't make out what it's supposed to be without seeing the front side of it; it could possibly be some kind of card reader maybe, or to provide some other kind of connection like say an HDMI port (although I don't think that's what it is).
The other board has about three of what looks like some kind of IC, could be something like a PIC microprocessor, but I have no idea what it's for.
Finally they've done something funky with the battery; I'd be curious to know what's under that metal? plate there.
Basically it might be some kind of science experiment, but I doubt the screen would fit back on correctly with the addition of those extra boards, so it's not like you could pass it off as an unmodified phone, not with the screen sticking out like it would.
I would probably start out by trying to figure out how the two circuit boards are attached to the original logic board. Is there any kind of soldered wiring between the logic board and the added ones? I don't see any connection between the two new boards, so it doesn't look like they're meant to work together, that is unless whoever started this project didn't get that far in their project.
If you can safely remove those two boards and whatever is going on in the battery compartment, at that point it might be worthwhile to connect up a screen and battery and see if it powers up. As long as you don't find any modified circuitry on the original logic board itself, I wouldn't worry too much about the possibility that it was made to steal your information. A full restore of the phone would eliminate the possibility of malware installed on it too.
I'd be curious to hear what you find; keep us up to date on your little project here!
crwdns2934105:0crwdne2934105:0
crwdns2934113:0crwdne2934113:0
crwdns2915270:0crwdne2915270:0
crwdns2889612:0crwdne2889612:0
2