Chosen Solution

ok wha about error 53 for the logic board replacement? is it posible i took a really damage i6 of a client and replace with my original i6 everything… does my customer have any risk of getting that error?

Error 53 was removed in a version of iOS 9, just restore it with iTunes and it should be fine.

There is still a risk of getting the same error message even if you replace if you replace the logic board though because this has to do mainly with the touch sensor that was built to be directly paired with that specific phone model. Here are a few more details regarding this issue. http://vkrepair.com/error-codes/iphone-6