TouchID has reportedly been giving Apple headaches, but evidence is starting to mount that the fingerprint reader will move to the Power button on the side of the phone. Forbes acquired schematics from case designer Nodus and created 3D renders based on them. What they show is that the Power button is significantly enlarged. Apple has already secured a patent for just such a setup. The Home button will go digital on the new wider screen display (5.8" in diagonal). It will be a part of a new "function area", which will also house the notifications. Those have been repositioned, since...
Source: http://www.gsmarena.com/iphone_8_renders_show_a_larger_power_key_that_could_house_the_fingerprint_reader-news-26228.php