replacing logic board
I am completely new to fixing phones but I am wondering what the logic board does to an iphone 4s. I am interested in fixing phones and a lot of them are Icloud locked. If I take a good logic board from a broken iphone and put it in an iphone that is icloud locked will the phone basically act like the phone that the logic board came from? Will the phone have the hard drive and carrier that the logic board phone had or are there other 'brain' features that will not let the other logic board work since the phone can recognize that the board is not it's own?