Samsung Galaxy S10 in-display fingerprint scanner reportedly blocked by screen cover

One of the most anticipated rumored features coming to the Samsung Galaxy S10 is an in-screen fingerprint scanner. Unfortunately, noted case maker Armadillotek has claimed that its screen cover can block the phone from reading fingerprints.

Conceivably, this might also apply to other translucent coverings separating the display from fingerprints, from thin screen shields to thick see-through covers in protective cases. 

Until we hear back from other sources, it’s unclear if this applies to any layer between display and finger or just certain ones of meet a minimum thickness or made from particular materials that interfere with Samsung’s rumored ultrasonic technology. 

It may not be a materials issue: when reached for comment, Armadillotek said it tested tempered glass and PET (polyethylene terephthalate) covers – and both blocked the fingerprint sensor. Consequently, Armadillotek said in its tweet, the company will forgo the screen protector on its signature Vanguard case.

Construction conflicts

The issue could lie with how the scanner reads fingers. Unlike fingerprint scanners in other phones that use light to scan skin surface (like in the OnePlus 6T), the one on the Samsung Galaxy S10 will allegedly use ultrasonic waves.

This won’t be a problem for every new Samsung phone: the standard Galaxy S10 and Galaxy S10 Plus are slated to get an in-display ultrasonic fingerprint scanner, while the one on the S10 Light will allegedly have an older-style fingerprint scanner mounted on the phone’s side.

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