Based on the latest rumors circulating in China, Apple is facing significant technical hurdles in its quest to develop under-display Face ID technology. This innovative technology is designed to seamlessly conceal the Face ID components beneath the screen. If Apple manages to pull it off, the distinctive 'Dynamic Island' design could eventually be phased out, leaving only a small cutout for the front-facing camera on the screen and moving closer to a truly full-screen aesthetic. Previous reports have suggested that Apple initially planned to debut this technology with the 2026 iPhone 18 Pro series, opting for a single-punch hole screen design and ditching the pill-shaped cutout altogether. The screen-to-body ratio for these models is anticipated to surpass an impressive 96%. However, the road to under-display Face ID is fraught with challenges, particularly concerning infrared light transmittance. To enhance transmittance, Apple has made strides by eliminating certain sub-pixels and incorporating cutting-edge technologies like 'stitched micro-lens glass' and 'local sub-pixel optimization.' These advancements have resulted in a boost of over 40% in infrared light transmittance. Nevertheless, several issues persist, including the yield rates in mass production, the cost of repairs, and the overall imaging quality of under-display cameras, all of which remain unresolved.