Finding a way to embed a fingerprint scanner into the display of your handset is seen the holy grail of smartphone biometrics. As phone makers push relentlessly towards the vision of “full-screen” devices, in-screen fingerprint provides yet another way to bump up that all-important screen-to-body ratio.

In-screen fingerprint also offers a futuristic edge — a much-needed differentiator in a homogenous marketplace of interchangeable, commoditized glass slabs. So it’s no surprise to have seen this burgeoning technology cropping up in supply chain rumors around future devices, particularly concerning the two biggest players in this industry: Apple and Samsung.

It’s been a couple of years since we first heard whispers of a full-screen Galaxy handset with a fingerprint scanner in the display. Indeed, Samsung’s current button setup, with a pressure-sensitive virtual clicky home key, seems to have been designed around this concept.

Yet so far, outside of a few concept devices from China, it has failed to materialize. That’s why, going into my review of the Porsche Design Huawei Mate RS, the thing most alluring to me about this $2000 handset was that, finally, someone was shipping a flagship phone fingerprint behind the display.

My enthusiasm, however, evaporated within minutes of actually using the feature. The process of registering fingerprints in the in-display sensor hammers home just how slow the new sensor is compared to the capacitive fingerprint tech we’ve been using for the past several years. Read more from…

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