In September of 2017, Apple showcased its commemorative iPhone X model with 3D facial recognition during its first autumn conference. This not only set off a 3D sensor technology whirlwind in the marketplace but also contributed to the rise in the supply chains’ market values. It is estimated that Apple’s three new models will adopt a 3D sensor in 2018, and the concerns over supply shortages will likely to continue. With some considerations, the Android mobile phone camp has held a relatively conservative attitude toward the adoption of 3D sensors. This report provides an in-depth analysis on the development opportunities and challenges of 3D sensors in mobile devices, such as smartphones and tablets.