Error 4013 iPhone 6

I have an iPhone 6 that sustained bad damage. It was dropped on the upper left corner near the silent switch. So much so the metal case buckled near the volume keys a bit. Obviously the screen is a lost cause. I went to try to see if iTunes could see it because it was the weekend and I couldn't get a new screen. When I plugged it in iTunes saw the phone as under a different account than what was signed in on the PC (phone belongs to a friend of my son). So I unplugged and put it aside (was getting g ready to go out for the night). Then I put the phone on a charger to make sure when I came back to it I had a charged battery.

When I came back to it I couldn't get the prompt to unlock the phone but iTunes was seeing it. So I plugged the screen back in and put the phone in DFU. I figured I'd try a upgrade and see if that helps. Well after it went through all that I got error 4013. I've read up on the error and feel it's NAND. I can't do a reball and don't want to pay for it. So the question is do you think a targeted reflow to just the NAND would work? By targeted I mean board removed and everything but NAND covered and protected. Then I hit the NAND with a heat gun. Not sure how long or at what temp. Thinking 30 sec at 400 F.