Samsung and Apple have both struggled to integrate fingerprint sensors into smartphone displays, creating workarounds like iris scanners and Face ID instead. The latter technologies are still big advancements in the mobile space, but the Holy Grail has been an invisible fingerprint sensor within your screen. That illusive tech has finally become a reality, but neither Samsung or Apple will be first. Synaptics announced on Tuesday that it has pioneered a way to mass produce fingerprint sensors integrated in smartphone displays and Vivo will be the first smartphone manufacturer to have it. Synaptics estimates that 70 million units can be produced in 2018.