Phone parts

As iPhone 6S carries 3D touch function, it is connected with home button flex, and then been together installed to back light, these three parts we called it back light. While regarding 3D touch, the quality will be quite different with various manufacturing technology. The cost of an original one is two or three times higher than an aftermarket one, to save cost and win more market share, manufacturers tend to popularize aftermarket back light.

Read more:https://www.etradesupply.com/blog/how-to-take-care-of-aftermarket-home-button-flex-on-iphone-6s-screen/