Galaxy S25 Ultra — Samsung Official Tempered Glass
The Galaxy S25 Ultra is a $1,299 phone with a 6.9-inch curved-edge AMOLED display, a titanium frame, and the latest version of Samsung's ultrasonic under-display fingerprint sensor. Two things matter when you choose a protector: the curve, and the sensor. Cheap flat tempered glass simply does not work on a curved Galaxy display — within weeks the edges lift, dust gets underneath, and the protector becomes a peeling annoyance. And aftermarket glass thicker than about 0.3mm will cause the ultrasonic fingerprint sensor to misread roughly one time in three.
Samsung's own official tempered glass is the safest, simplest answer. It is calibrated for the exact dimensions of the curved screen, the precise thickness tolerance of the fingerprint sensor, and the new Gorilla Armor 2 surface — and it ships with proper installation tools. The single-pack is around $27 on Amazon, which is noticeably more than aftermarket options, but it is also the only protector we recommend without a caveat for this phone. After eighteen months of testing, ours still sits flat on the screen and the fingerprint sensor still works on every read.
If you want the absolute best edge-to-edge coverage and you are willing to risk a one-shot installation, Whitestone Dome Glass is the gold standard. Its UV-cured liquid optical adhesive flows under the glass and fills every microscopic gap with the curved display, then cures under the included UV lamp in about three minutes. The result is true edge-to-edge bonding that no other product matches. The catch: if dust gets trapped under the liquid before it cures, you start over with a new kit. Not for the impatient. Worth it on a $1,299 phone you plan to keep for three years.