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Glossary

Fingerprint sensor

Unlocks the phone with your finger — under the screen (optical or ultrasonic) or on the side button.

In-display sensors are either optical (reads a lit image) or ultrasonic (reads a 3D map with sound waves; works better with wet fingers). Side-mounted sensors sit in the power button. Some phones use secure 3D face recognition (for example Face ID) instead.

Also called: ultrasonic, optical fingerprint, face id, face unlock

More terms

3.5 mm headphone jackThe classic wired headphone socket. Most flagships dropped it; use USB-C or Bluetooth headphones instead.Nits (brightness)A unit of screen brightness (candela per square metre). Higher peak nits help in bright sunlight and with HDR.Seat heightHeight of the seat from the ground in mm. Lower seats make it easier for shorter riders to put their feet down.Chipset (SoC)The phone's main chip: CPU, graphics, AI engine, modem and more in one package. It decides speed and efficiency.L3 cacheFast memory on the processor that keeps frequently used data close. Large caches (e.g. X3D chips) help games a lot.NFCShort-range radio used for contactless payments, transport cards and quick pairing.

All glossary terms