Smartphone fingerprint sensors come in all shapes and sizes. The physical fingerprint sensors, which can be positioned at the back, front, or even the side, are considered to be the most accurate.

Several Galaxy S25 Ultra users report that the fingerprint scanner is unreliable, slow, or not working at all. The following fixes address the most common causes of fingerprint recognition failures.

I've been writing about Android since 2011, with a focus on device reviews, Samsung and Google Pixel hardware, and the latest happenings in the ecosystem. In my entire writing career, I've reviewed ...