It is a very common fault in the iPhone 6 when the user makes a mistake and screws the larger screw in the wrong place. So in this case, to repair this device you have to rebuild the tracks one by one.
In this tutorial we show the way to do it and for that we ll see that your need some experience and good tools also :)
It's a pretty complicated repair and we need a good microscope.
If you have any question about this repair, please leave your comment above and we ll be glad to answer it!
Enjoy it!