Google's upcoming Pixel 9 line will reportedly feature a faster and more reliable ultrasonic fingerprint scanner. Android AuthorityIt would replace the under-display optical fingerprint sensor that Google introduced on the Pixel 6 with the newer technology that's capable of reading even wet or oily fingerprints.
The change could also address some of the widespread affairs that users have experienced when trying to unlock their Pixel devices, with some people saying that light levels and dryness of fingers can affect the reliability of the older optical reader. Optical scanners are the oldest method of reading fingerprints. They work by flashing light over the user's finger and then visually detecting patterns and ridges on the surface, meaning any changes like dirt or blemishes can interfere with the process.
In contrast, ultrasonic sensors read fingerprints more accurately by bouncing ultrasonic pulses off them, which also prevents users from going blind if they need to unlock their phones at night. According to reliable leaker Kamila Wojciechowska, the Pixel 9 will use Qualcomm’s 3D Sonic Gen 2 (QFS4008) — the same model found in the Samsung Galaxy S24 Ultra.
