The S23 Ultra supports Dolby Atmos, which provides an immersive audio experience. You can enable Dolby Atmos in the sound settings and adjust the "Sound effects" to suit your preferences.

: Dialing *#0*# opens a hidden interface to test your display, vibration, speaker, and sensors—essential for checking a new or used device.

Rapidly tap seven times until a message says "Developer mode has been turned on."