Not much has changed on the surface since the Apple iPhone 6 introduced an updated look with a laminated screen and comfortably round corners. This time around, though, Apple is beating its chest for incorporating Series 7000 aluminum instead of the anodized aluminum it's been traditionally using. The screen on the iPhone 6s is virtually unchanged from what the iPhone 6 brought to the table, but the smartphone has gained 3D Touch control that lets users deliberately choose between a light tap, a press, and a "deeper" press, triggering a range of specific controls. Other notable additions include the Apple A9 chipset, and a 12MP rear camera with 4K resolution video recording.